05 Buick, Chevrolet and GMC Mid-Sized Utilities 4.2 LL8 P0300 Engine Miss , Ignition Coil Disconnected - kw P0301 P0302 P0303 P0304 P0305 P0306 misfire rough idle connector loose
| Subject: | 05 Buick, Chevrolet and GMC Mid-Sized Utilities 4.2 LL8 P0300 Engine Miss, Ignition Coil Disconnected |
| Models: | . |
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Condition/Concern:
Engine misfire with DTC P0300 P0301 P0302 P0303 P0304 P0305 P0306 setting.
Recommendation/Instructions:
Inspect the connections at the ignition coils. In some cases it maybe necessary to lengthen the engine ignition coil harness to obtain proper connection. Extra length of wire can be gained by rearranging the wire in the loom. Do not cut and splice to add additional wire to this harness.
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Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.
Models:
(05 Chevrolet Trailblazer and Trailblazer EXT) and (05 GMC Envoy, Envoy XL and Envoy XUV) and (05 Buick Rainier)
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