| Subject: | Recommended Rear Axle Lubricant | 
| Models: | 2000-01 Rear Wheel Drive Passenger Cars, Light Duty Trucks and Four Wheel Drive Vehicles | 
This bulletin is being revised to update the model year information in the table below. Please discard Corporate Bulletin 01-00-90-001 (Section 00 -- General Information).
The following table provides the latest information on recommended rear axle lubricant.
Model Year(s)  | Model(s)  | Usage  | Recommended Lubricant  | Recommended Maintenance  | 
|---|---|---|---|---|
2000-1  | Cadillac Catera  | Rear Axle  | SAE 80W-90 GL-5 Axle Lubricant, GM P/N 12345977 (in Canada use P/N 10953482) or equivalent.  | Check axle fluid level and add fluid as needed every 30,000 miles (48 000 km).  | 
2000  | Cadillac Escalade  | Rear Axle  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115.  | Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000  | Chevrolet Astro/Express, GMC Safari/Savana  | Rear Axle (Standard)  | SAE 80W-90 Axle Lubricant, GM P/N 1052271 (in Canada use P/N 10950849 or equivalent.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000  | Chevrolet Astro/Express, GMC Safari/Savana  | Rear Axle (Locking Differential)  | Axle Lubricant, use only GM P/N 1052271 (in Canada use P/N 10950849). Do not add friction modifier.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Drain fluid and refill at first engine oil change. Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000-1  | Chevrolet Blazer/S10, GMC Envoy/Jimmy/Sonoma  | Rear Axle (Standard)  | SAE 80W-90 Axle Lubricant, GM P/N 1052271 (in Canada use P/N 10950849) or equivalent.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000-1  | Chevrolet Blazer/S10, GMC Envoy/Jimmy/Sonoma  | Rear Axle (Locking Differential)  | Axle Lubricant, use only GM P/N 1052271 (in Canada use P/N 10950849). Do not add friction modifier.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Drain fluid and refill at first engine oil change. Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000-1  | Chevrolet Camaro, Pontiac Firebird  | Rear Axle (Standard)  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115.  | Check axle fluid level and add fluid as needed at least twice a year (for instance, each spring and fall).  | 
2000-1  | Chevrolet Camaro/ Corvette, Pontiac Firebird  | Rear Axle (Limited Slip)  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115. With complete drain and refill, add 4 ounces (118 ml) of Limited Slip Axle Lubricant Additive, GM P/N 1052358 (in Canada use P/N 992694) or equivalent.  | Check axle fluid level and add fluid as needed at least twice a year (for instance, each spring and fall).  | 
2000-1  | Chevrolet Silverado/Suburban/Tahoe, GMC Denali/Sierra/Yukon/Yukon XL  | Rear Axle  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115.  | Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2000-1  | Chevrolet Tracker  | Rear Axle  | SAE 80W-90 GL-5 Axle Lubricant, GM P/N 12345977 (in Canada use P/N 10953482) or equivalent.  | Short Trip/City Intervals: Change differential fluid every 15,000 miles (25 000 km). Long Trip/Highway Intervals: Change differential fluid every 30,000 miles (50 000 km).  | 
2000-1  | Oldsmobile Bravada  | Rear Axle (Locking Differential)  | Axle Lubricant, use only GM Part No.1052271 (in Canada use P/N 10950849). Do not add friction modifier.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Drain fluid and refill at first engine oil change. Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2001  | Chevrolet Astro, GMC Safari  | Rear Axle (Standard, Locking Differential)  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115.  | Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2001  | Chevrolet Express, GMC Savana  | 8.6 Inch, Rear Axle Only (Standard, Locking Differential)  | SAE 75W-90 Synthetic Axle Lubricant, GM P/N 12378261 (in Canada use P/N 10953455) or equivalent meeting GM Specification 9986115.  | Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2001  | Chevrolet Express, GMC Savana  | 9.5, 10.5 Inch Rear Axles (Standard)  | SAE 80W-90 Axle Lubricant, GM P/N 1052271 (in Canada use P/N 10950849) or equivalent.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2001  | Chevrolet Express, GMC Savana  | 9.5, 10.5 Inch Rear Axles (Locking Differential)  | Axle Lubricant, use only GM P/N 1052271 (in Canada use P/N 10950849). Do not add friction modifier.  | If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Drain fluid and refill at first engine oil change. Short Trip/City Intervals: Check axle fluid level and add fluid as needed every 3,000 miles (5 000 km). Long Trip/Highway Intervals: Check axle fluid level and add fluid as needed every 7,500 miles (12 500 km).  | 
2001  | Chevrolet 3500 HD, GMC Sierra 3500 HD  | Rear Axle  | SAE 75W-140 Synthetic Axle Lubricant, GM P/N 12346140 (in Canada use P/N 10953492) or equivalent.  | Short Trip/City Intervals: Check axle fluid level and add as needed every 3,000 miles (5 000 km). Change axle fluid if the vehicle is driven in extreme overload, trailer towing and/or high-speed (above 40 mph or 70 km/h) conditions for extended periods of time every 30,000 miles (50 000 km). Long Trip/Highway Intervals: Check axle fluid level and add as needed every 7,500 miles (12 500 km). Change axle fluid with high-speed use every 30,000 miles (50 000 km).  |