For 1990-2009 cars

# HIGH NOISE LEVEL FROM COOLING FAN (REVERSE FANS)

#### SUBJECT: HIGH NOISE LEVEL FROM COOLING FAN (REVERSE FANS)

#### VEHICLES AFFECTED: 1993 "D" MODELS WITH COOLING OPTION (RPO V03)

#### CONDITION:

--------- On the 1993 Cadillac "D" Car with the V03 option (Extra Capacity Cooling), the cooling fan may be noisy.

#### CAUSE:

----- The primary cooling fan is a 240 watt unit. This unit may have an unacceptable level of noise. A production change was made to use the 150 watt fan as the primary, and the 240 watt fan as the secondary, in September of 1992, with VIN PR700899.

#### CORRECTION:

---------- 1. To insure that the fan noise is not confused with A/C compressor moan, disconnect the primary fan, and run the vehicle with the A/C on. If the noise goes away, proceed with the correction. If it does not, investigate for causes of compressor moan.

2. Disconnect negative battery cable.

3. Remove the two cooling fans, and reinstall in reverse position, following the instructions of pages 6B-11 and 12 of the 1993 Fleetwood Preliminary Service Manual. This will put the 150 watt fan on the left hand side as the primary fan, and the 240 watt fan on the right hand side as the secondary fan.

4. Replace the 30 amp Maxi-fuse #7 ("SCNDRY CLG FAN") with a 50 amp Maxi-fuse. This fuse is located in the underhood electrical centre (See page 8A-201-6, Figure 13). Page 8A-11-3 shows a close-up of the electrical centre.

5. Replace the electrical centre cover with P/N 10233852, which has a corrected fuse chart.

6. Reconnect negative battery cable.

#### WARRANTY INFORMATION:

For vehicles repaired under warranty use:

Labour Time: 0.4 Hrs.

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U ---------------------------------------------------------------------------- CATEGORY - 7A "AUTOMATIC TRANSMISSION / TRANSAXLE" -------------------------------------------------- New Product Announcement All 1993 C/K-Trucks 4L60-E 93-7A-100* x 10/31/92 Hydra-Matic 4L60-E Under 8600 GVWS/T- Trucks With 4.3L Non Turbo M/L and G-Vans

Additional Alignment Ribs 1993 "C, E, H, K, W" 4T60-E 93-7A-101 x 11/14/92 Added To Transaxle Models and "U" Van Electrical Connector (7 Way) With 4T60-E (General Information) (Rpo M13) Transaxles

Constant Or Intermittent 1991-93 "C/K, R/V, P" 4L80-E 93-7A-102x 11/14/92 Check Engine Light, Line 6.2 Trucks And "G" Pressure And TCC Van With LL4 4L80-EHD Fluctuation 6.2 Diesel (Vin J) Or L65 (No Codes Stored) 6.5 Turbo Diesel (Vin F) (Diagnose Per LH6 Chart) With 4L80-E/4L80-EHD (MT1) Transmission

Loss Of Third, Direct Clutch 1992 "C/K, P" Truck 4L80-E 93-7A-103 x 11/14/92 Distress And/Or Slips In and "G" Van Reverse (New Dished Plate) With 4L80-E/4L80-EHD (MT1) Transmission

Harsh 1.2 Upshift (Install 1992 "B,D,F,Y" Models; 4L60 93-7A-104 x 11/14/92 Service Package) "C/K,S/T" Trucks; "G,L,M" Vans With 4L60 Transmission

Revised Accumulator Bushing 1993 "C,E,H,K,W" 4T60-E 93-7A-105 x 11/14/92 Models and "U" Van And Retaining Clip with 4T60-E Transaxle Rpo M13) Revised Converter Clutch Regulator Line-Up (Information)

Information on New Cooler 1993 "E,K,V" Models 4T80-E 93-7A-106 x 11/14/92 Return Fitting, Fluid Level With 4T80-E Transaxle Indicator And Checking Procedure

Transmission Control Lever 1986-91 "E,K" and 93-7A-107*x 11/14/92 (Shifter) Effort (Replace 1987-91 "V" Models Lever With Riviera Lever)

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U ---------------------------------------------------------------------------- CATEGORY - 7A "AUTOMATIC TRANSMISSION / TRANSAXLE" (continued) -------------------------------------------------------------- Scan Tool Loss 1993 "C/K, S/T" 4L60-E 93-7A-108 x 11/30/92 Of Communication Trucks And "M/L, G" (Information) Vans with 4L60-E Trans.

Buzzing Noise On 1993 "C/K, S/T" 4L60-E 93-7A-109 x 11/30/92 Engine Shutdown Trucks and "G, M, L" (Install New Vans With 4L60E Trans. Pressure Regulator Valve)

Buzzing Noise 1982-93 "B,D,F,Y" 4L60 93-7A-110 x 11/30/92 At Idle Trucks And Models, (Install New "C/K, R/V, S/T" Pressure Regulator "G,M,L" Van With 4L60 Transmission Valve)

Slow/No TCC Apply 1993 "N" Model 3T40 93-7A-111 x 11/30/92 Or TCC Shudder With 2.3L SOHC (Replace Auxiliary Engine and 3T40 Automatic Transaxle Valve Body Cover Gasket)

Torsional Rattle 1991-92 "S" Trucks 4L60 93-7A-112 x 12/15/92 After Torque Converter with 2.5L Engine Clutch Lockup (Vin A, Rpo L38) (Replace Torque Converter) and 4L60 Automatic Transmission

No Drive or Reverse, 1992 "C, H" Models 4T60-E 93-7A-113 x 12/31/92 Slips, Harsh 1-2 Up/Down Shifts, Soft 2/3 Up/Down Shifts (Install Correct Checkballs)

On-Vehicle Sediment 1993 "V" Model 4T80-E 93-7A-114 x 12/31/92 Inspection (Information)

Front End Vibration, 1993 "E/K" Models 4.6L 93-7A-115 x 1/15/93 Shake, Or Looseness With 4.6L Engine Feel Over (Vin 9, Rpo L37) Bumps (Replace Transmission Mount)

Transaxle Fluid Leak 1991-93 "C,E,H,K,W" 4T60E 93-7A-116 x 1/30/93 At Converter Seal Models And "U" Vans With (Install New Helix 4T60E Automatic Transaxle Converter Seal)

Service Procedure- 1985-89 "C" And 44OT4 93-7A-117 x 1/30/93 Code E39 Viscous 1986-90 "E And K" Models Converter Clutch Diagnosis

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U --------------------------------------------------------------------------- CATEGORY - 7A "AUTOMATIC TRANSMISSION / TRANSAXLE" (continued) --------------------------------------------------------------- Clunk Noise From 1992-93 "N,L" 3T40 93-7A-118 x 1/30/93 Driver's Side On Models With 3T40 Automatic Transaxle Turns (Check Torque Of Transaxle Mount Pipe Expansion Bolt)

Squawk/Moan Noise 1991-92 "C" And 93-7A-119 x 1/30/93 When TCC Applies 1992 "H" Models /On Decel At Approx. 1900 RPM (Install New Transaxle Cooler Brackets)

Reusable Bottom Pan 1991-93 "A,C,E,H, 4T60 93-7A-120 x 1/30/93 Gasket (General K,W,V" Models And 4T60-E Information) "U" Van With 4T60 (Rpo M13) Or 4T60-E (Rpo ME9) Transaxle

Driveline Vibration 1992-93 "S/T" Trucks 4L60 93-7A-121 x 1/30/93 And/Or Gear Rattle With 4.3L Engine 4L60-E With TCC Applied (Vin W, Rpo L35) (Install New Torque And 4L60 (Rpo MD8) Converter Assembly) Or 4L60-E (Rpo M30) Transmission

Service Manual Update 1993 "C/K, S/T" 4L60-E 93-7A-600 x 11/30/92 - Section 7 Trucks and "M/L, G" Van Hydra-Matic 4L60-E Automatic Transmission Diagnosis

Service Manual Update 1993 "B,D,F,Y" 4L60 93-7A-601 x 11/30/92 - Section 7 - 1993 Models and "S/T" Hydra-Matic Truck With 2.5L Engine 4L60 Transmission Unit Repair - Accumulator Assembly

Service Manual Update 1990-92 "U" Vans 3T40 93-7A-602* x 1/30/93 - Section 7A With 3.1 L Engine Transaxle Removal And (Vin D, Rpo LG6) And 3T40 Transaxle Installation Procedure Change

Service Manual Update 1989-91 "M" Model 93-7A-603# X 11/30/92 - Section 7A Automatic Transaxle Control Module (TCM) Replacement

Service Manual Update 1992 "C,E,H,W" 4T60-E 93-7A-604 x 12/31/92 - Section 7A Models and "U" Vans with 3800 Engine Automatic Transaxle Diagnosis

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U --------------------------------------------------------------------------- CATEGORY - 7A "AUTOMATIC TRANSMISSION/TRANSAXLE" (continued) ------------------------------------------------------------ SMU-Section 7A 1992 "E" Models 4T60-E 93-7A-605 x 12/31/92 - Automatic Transaxle with 3800 Engine (Vin L) Removal and Installation (New Service Procedure)

CATEGORY - 7B "MANUAL TRANSMISSION/TRANSAXLE" --------------------------------------------- Incorrect Fluid Level 1992 "N" Model 5 Speed 93-7B-100 x 11/30/92 Indicator Reads Overfull With 2.3L Engine Manual Transaxle Or Underfull (Information) (Vin 3, A / Rpo L40, LG0 And 5 Speed Manual Transaxle

Shift Lever Shake 1991-93 "C/K, P" NV4500 93-7B-101 x 12/31/92 And/Or Noise in 2nd Gear Trucks With 5sp M/T (Service Procedure) NV4500 5sp M/T

Neutral Gear Rattle 1990-92 "C/K" 5sp M/T 93-7B-102# x 1/30/93 (Replace Clutch Disk, And 1990-91 "S/T" Trucks With 4.3L Prom And Pilot Bushing) Engine (Vin Z, Rpo LB4) And 5sp Manual Transmission (Rpo'S MG5, MY2)

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U --------------------------------------------------------------------------- CATEGORY - 7C "CLUTCH" ---------------------- Information On 1990-93 Topkick 93-7C-500 x 11/14/92 Clutch Adjustment /Kodiaks And Release Bearing Lubrication Procedures

CATEGORY - 7D "TRANSFER CASE"

Electrical Shift 1992-93 "T" Trucks New 93-7D-100 x 10/31/92 Encoder Replacement Process 233

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U -------------------------------------------------------------------------- CATEGORY - 8A "ELECTRICAL TROUBLESHOOTING" ------------------------------------------ "A" Note Horn 1993 "V" Models 93-8A-100 x 10/31/92 Bracket Falling Off (Cadillac Allante Built Between Vin (Fasten Horn Brackets 125022 and Vin 125200) With New Mounting Bolt)

Battery Intermittently 1991-92 "C and 93-8A-101 x 10/31/92 Goes Dead/Windows H" Models Operate After Door Opened (Replace With New BTSI Solenoid)

Intermittent BCM 1993 "V" Models 93-8A-102 x 11/30/92 Codes B446, B449 And B450 (Install New BCM Service Prom)

Dimmable Interior 1991-92 "C" 93-8A-103 x 12/31/92 Displays Not Bright And 1992 "H" Models Enough With Headlights On (New Dim/Twilight Sentinel Control)

Radio Telephone/ All 1993 Vehicles 93-8A-104 x 12/31/92 Mobile Radio installation And Troubleshooting Guidelines

Information On New 1992 "H" Model 93-8A-105 x 1/15/93 Power Door Lock Switch With Option Rpo UA6 Service Kit And Procedure

Starter Inoperative/ 1991-92 "Y" Model 93-8A-106 x 1/15/93 Clicks/No Start With Automatic Transmission (Reroute Wire Harness)

Intermittent Electrical 1992-93 "N"Models 93-8A-107 x 1/15/93 Conditions (Repair/Reroute Engine Harness)

Inoperative Courtesy 1992 "B" Models 93-8A-108 x 2/15/93 Lights (Tape Wire) With Police Option 9C1 Only

Inoperative 1993 "A" Models 93-8A-109 x 2/15/93 Speedometer Without Cruise Control (Insert Insulator in Connector)

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U --------------------------------------------------------------------------- CATEGORY - 8A "ELECTRICAL TROUBLESHOOTING" (cont) -------------------------------------------------- Codes E047, B333, 1986-92 "E,K,V" Models 93-8A-110 x 2/15/93 B334, B335, B336, And/Or B337 (New Diagnosis Procedure)

Electrical Systems/ 1992 "C and H" Models 93-8A-600 x 10/31/92 Service Manual Update Section 8A Electrical Diagnostic Revisions

Service Manual Update 1991-92 "C and H" Models 93-8A-601 x 10/31/92 - Section 8A Sunroof (Revised Diagnostics)

Service Manual Update 1991-92 "E/J" Truck 93-8A-602*# x 1/30/93 - Section 8A AIC Compressor Clutch Diagnosis - Revised Schematic

Electrical Systems 1991-92 "C" Model 93-8A-603 x 10/31/92 Manual Update - Memory Seat/Memory Mirrors (A43) Revised Diagnostics

Service Manual Update, 1992-93 "T" Models 93-8A-604# x 10/31/92 Section 8A Rear Defogger Ground (G402) Location (Rpo C49)

Service Manual Update 1992 "N" Models With 93-8A-605 x 10/31/92 - Section 8A Power Windows (Option A31) Expreas Down Window Module Relocation

Service Manual 1990-92 "E" Models 93-8A-606 x 10/3l/92 Revision Section 8D-2

Service Manual Update 1992 "S/T" Truck 93-8A-607 X 11/30/92 - Revised Schematics

Esm Update - Antilock 1992 "C,H" Models 93-8A-608 x 12/31/92 Brake System Antilock Indicator "Off" Fault Test R

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U ---------------------------------------------------------------------------- CATEGORY - 8A "ELECTRICAL TROUBLESHOOTING" (continued) ------------------------------------------------------ Service Manual Update 1992 "W" Model 93-8A-609 x 12/31/92 - Section 8A Additional Information For Two Position Oil Pressure Indicator Gage

ESM Update-SIR System 1992-93 "C/H" Models 93-8A-610 x 12/31/92 Diagnosis Code 24, 25 or 26 Set (Revised Diagnostics)

Service Manual Update 1990-92 "Y" Model 93-8A-611 x 12/31/92 - Section 8A - Revised Chart For Fuel Gage Charts 12,13, And 14 (Revised Information.)

Service Manual Update 1992 1/2 "U" Van 93-8A-612 x 12/31/92 - Section 8A Pass Thru Harness Connector

Service Manual Update 1991-92 "E" Model 93-8A-613 x 12/31/92 -Sections 8A-301-0, 8A-114-8, 8A-301-4 and 8D-29 (Door Handles Switch Diagnostics)

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U ---------------------------------------------------------------------------- CATEGORY - 8B "CHASSIS ELECTRICAL" ---------------------------------- Tailgate Window 1983-91 "S/T" Trucks 93-8B-100 x 1/15/93 Defogger Will Not Function (Replace Tailgate Glass Lift/Support Cylinders)

Windshield Washer 1992-93 "L,N" Models 93-8B-101 x 2/15/93 Fluid Loss / Washer Inoperative (Install Clamp On Pump Outlet Elbow)

CATEGORY - 8C "INSTRUMENT PANEL AND GAUGES"

Instrument Panel 1992 "L" Models 93-8C-100 x 10/31/92 Squeak (Reposition Insulator Panels And Apply Felt Strips)

Incorrect Vehicle 1987-1992 "V" Model 93-8C-101* x 12/15/92 Speed Reading At Idle (Cadillac Allante) in Gear (Diagnosis Outlined)

Incorrect Or Erratic 1990-93 All Light 93-8C-102 x 12/31/92 Oil Pressure Readings Duty Models (Install New Oil Pressure Sensor)

Speedometer Registers 1988-93 "C/K", 93-8C-103 x 12/31/92 When Vehicle is 1989-93 "S/T" Trucks And 1990-93 TopKick Stationary (Information)

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1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

#### SUBJECT VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U --------------------------------------------------------------------------- CATEGORY - 8C "INSTRUMENT PANEL AND GAUGES" (continued) ------------------------------------------------------- Buzz Or Rattle Noise 1992 "H" Models 93-8C-104 x 12/31/92 In Instrument Panel Area (Install New Bracket For Low Frequency Audio Amplifier)

Sag Between Instrument 1992 "H" Models 93-8C-105 x 1/15/93 Panel And Defroster Grille (Install Instrument Panel Support Kit)

Instrument Panel/Cowl 1993 "V" Model 93-8C-106 x 1/30/93 Jitter/Vibration (Replace Front And Stabilizer Bar Insulators And Transaxle Mount)

Aftermarket Radio May 1990-93 "Y" Model 93-8C-107 x 2/15/93 Set DTC's 72 And 74 In CCM (Information Only)

Instrument Panel Cup 1991-93 "B,J,L,S" 93-8C-108 x 2/15/93 Holder Binding/Stuck Models And "C/K" Trucks (Remove And Wash Cup Holder Assembly)

Light Leak In Right 1992 "N" Model 93-8C-109 x 2/15/93 Hand Centre Air Outlet (install Seal On Side Of VP Cluster Cover)

Oil Life Index Will 1993 "D" Models 93-8C-110 x 2/15/93 Not Reset (Adjust Cable Adjuster)

Service Manual Update 1992 "H" Model 93-8C-600 x 10/31/92 - Section 8C Revised Starter Enable Relay - Remove And Install Procedure

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General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.