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Makes 🢒 GMC_Truck 🢒 2004 🢒 Envoy - 2WD 🢒 Bulletins 🢒 Headlamp Flicker Or Momentary Dim While Driving Supplement To Bulletin 06-06-03-004 - keywords air AIR battery characteristic dim erratic flicker fluctuation headlamp headlight injection K18 LL8

Headlamp Flicker Or Momentary Dim While Driving Supplement To Bulletin 06-06-03-004 - keywords air AIR battery characteristic dim erratic flicker fluctuation headlamp headlight injection K18 LL8

Subject:Headlamp Flicker or Momentarily Dim While Driving Supplement to Bulletin 06-06-03-004

Models:2004-2005 Buick Rainier
2004-2005 Chevrolet TrailBlazer
2004-2005 GMC Envoy
2004 Oldsmobile Bravada
Equipped with the 4.2L Engine (VIN S - RPO LL8) and Electric Air Injection Reactor System (RPO K18)


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Some customers may comment of an intermittent headlamp flicker while driving. This flicker has been described in bulletin 05-08-42-001 and 06-06-03-004. This will only affect vehicles equipped with the 4.2L Engine (VIN S - RPO LL8) and Electric Air Injection Reactor System (RPO K18).

Recommendation/Instructions:

Engineering is working on a revised calibration for this concern. Do not perform any repairs until a fix becomes available from engineering.

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.