Suspension Noise Problems of GMC Canyon

Transmission continually has issues with the first to second gear change, shudders at low speeds and when decelerating, and produces a loud �clunk� noise when when reverse gear is engaged. In addition to the � clunk�, the body of the vehicle is subject to a rapid movement as the reverse gear is engaged. The vehicle has been returned to the dealership in order to resolve the issue however, I have been turned away for repairs as they claim it is a characteristic trait of the 8l90 ( 8 speed) transmission. The TSB of changing the transmission fluid to the mobil1 did temporarily mask the issue. The issue has returned and worsened and this has happened to many people. On to the suspension, my vehicle is equipped with the � all-terrain� suspension package. My vehicle is subject to a very loud suspension � squeak� along with a poor ride.

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The rear suspension leaf packs emit a loud squeaking noise when moving over uneven terrain. This happens at all speeds. The suspension sounds like it is in a bind and then slips. The sound can be described as a squeaking rattle or a loud chirp. The dealer service bulletins say to grease the components and not to replace them. The issue is unresolved and could lead to a safety issue if any parts fail.

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