For 1990-2009 cars only
SMU - Revised DTC P1221
| Subject: | Revised DTC P1221 |
| Models: | 2001-2002 Chevrolet Corvette |
| 2001 Chevrolet and GMC C/K Pickup and Utility Models (Silverado, Sierra, Sierra C3, Suburban, Tahoe, Yukon, Yukon XL) |
| 2001 Chevrolet and GMC G-Van Models (Express, Savana) |
| 2001-2002 Chevrolet and GMC 3500 HD Models |
| 2001-2002 Chevrolet and GMC C-Series Medium Duty Conventional Cab Models |
| 2001-2002 Chevrolet and GMC B7 Medium Duty School Bus Models |
| With 4.8L, 5.3L, 5.7L, 6.0L or 8.1L Engine (VINs V, T, G, S, U, G -- RPOs LR4, LM7, LS1, LS6, LQ4, L18) |
This bulletin is being issued to revise step 2 of DTC P1221 in the Engine Controls sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI2000. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
The text "DTC P1515" has been deleted in step 2. Step 2 of this diagnostic table should read as follows:
Step | Action | Yes | No |
|---|---|---|---|
2 | Is DTC P1518 also set? | Go to Diagnostic Trouble Code (DTC) List | Go to Step 3 |
