Low Oil Pressure Or Siezed Oil Pump - keywords 07 08 5.3 6.0 6.2 engine knock L76 L92 LC9 LH6 LS4 noise tick
| Subject: | Low Oil Pressure or Seized Oil Pump |
| Models: | 2007-2008 Cadillac Escalade |
| 2007-2008 Avalanche, Chevrolet Express, Silverado, Suburban, Tahoe, Trailblazer |
| 2007-2008 GMC Savana, Sierra, Yukon |
| Vehicles equipped with aluminum block engines RPO codes L76 L92 LC9 LH6 LS4 |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
The customer concern may be low oil pressure, no oil pressure, or engine noise.
Recommendation/Instructions:
Complete the current diagnostic for any diagnostic trouble codes or symptoms found. If a customer concern of engine noise has been verified, and low oil pressure has been found, replace the oil pump, flush the oil cooler lines, clean the oil pan, and change the oil and filter.
It is possible for the oil pump to seize, and start to work again when the engine cools down. Evaluate all customer concerns of low oil pressure closely, and replace oil pumps as necessary.
Note: If an engine noise is noticed after replacing the oil pump, use the current SI diagnostic for the symptom found, and make repairs to the engine as needed.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
