Parts Bulletin

GroupNumberVersion P-21-7101

Oil Filters

Models: all GM engines

Distribution: PartsDate: March 2005 Binder: PartsReplaces: N/A

These are the oil filters for GM engines;

Oil filters mounted on block;

3.0L engines: 835440 and 3852412

V6 engines: 841750

V8 engines: 3850559, 835440 and 3852412

3852412 is shipped on some engines, it is replaced by 835440 in the Parts system.

For remote oil filter kits; Use 3850559 or 835440.

Note! for later 8.1L engines only use 835440, 3850559 will not clear the ignition coils mounted below the filter.

Note! for 7.4/8.2L only use 3850559.

Caution! Gas engines require a precise oil fill level to operate correctly. Overfilling results in high operating temperatures, foaming (air in oil), loss of power and reduced engine life. Underfilling causes loss of lubrication. Always check for correct oil fill on the dipstick when changing engine oil.

Workshop Manual 7743372

Models

5.0 & 5.7 Liter

Distribution:MDate:11-2004Binder:C

The Oil Capacity specification has changed:4.5 quarts (4.2 liters) without oil filter change

5.5 quarts (5.2 liters) with oil filter change For the following engines:

5.0 GL-A/B/C/D/E

5.0 GXi-A/B(F)/C(F)/D(F)/E(F)

5.0 OSi-B(F)/C(F)/D(F)/E(F)

5.7 GL-A/B/C/D/E

5.7 Gi-A/B(F)/C(F)/D(F)/E(F)

5.7 GXi-A/B/C(F)/D(F)/E(F)/F(F)

5.7 OSi-A(F)/B(F)/C(F)/D(F)/E(F)

5.7 OSXi-A(F)/B(F)/C(F)/D(F)/E(F)

5.7 GiI-A/B/C/D/F

5.7 GXiI-A/B/C/D/F

To insure the engine oil is filled to the correct level, the level must always be checked on the dipstick. This includes re-filling the crankcase as part of changing the engine oil.

Please place the self adhesive corrections on the following pages for your workshop manual 7743372 in the following locations:

Page 10Table 4 Crankcase Capacities

Page 161Tune Up Specifications

Table 4 Oil Capacity

Table 5 Oil Capacity

Page 162Table 6 Oil Capacity

Diagnostics -Mechanical

Always start with the base engine!

•Vacuum gauge can help identify potential mechanical problems

•Manifold vacuum determines load for the system

•Read the spark plugs carefully

•Compression test with a good battery

•Leak-down test for more advanced look at cylinder and valve conditions

•Electrical connections! Low voltage or voltage drops can be extremely problematic to the system

The fuel injection system is limited in that it can’t help an engine that has mechanical problems. Often times the system will create a new symptom that will lead you in the wrong direction. For example, black carbon fouled plugs could be due to a stuck open thermostat that causes the system to add fuel in what is called a “multiplier”. The same symptom can also be a tulipedvalve that lowers manifold pressure. This in turn tells the system it is under more load than normal and it will add fuel. Any mechanical condition that causes less vacuum to be built up in the intake is assumed by the ECM to be an increase of load on the engine.

Vacuum gauge diagnostics are located in the engine mechanical workshop manual.