Model Year(s) | Vehicle Line(s) / Condition | Do This | Don't Do This | Reference Information/Bulletin |
2004-05 | Chevrolet TrailBlazer, GMC Envoy, and Buick Rainier - Front drive axle leak at case half | Install shim between front axle case and engine oil pan | Don't remove and reseal or replace front axle assembly | 04-04-19-002 |
1997-99 2000-05 | Aurora, Deville, Eldorado, Bonneville - Transmission buzz noise, decel or reverse | Inspect/replace accumulator retaining ring/clip | Don't replace complete valve body assembly | 05-07-30-029 |
2005-06 | C/K 1500 Silverado/Sierra - Markings make crank pulley appear out of round | Replace pulley if actually out of round. | Don't replace crank pulley if not out of round | 05-06-01-029 |
2003-05 | C/K, GMT 610, M/L, S/T - Low power at high ambient temperatures | Upgrade engine calibration. | Don't replace engine module, catalytic converter, fuel pump, MAF sensor or O2 sensor | 05-06-04-077 |
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