Table 1 shows five common power train related problems of the 2003 GMC Sonoma. The number one most common problem is related to the differential unit (three problems). The second most common problem is related to the manual transmission floor shifter (one problem).
| Problem Category | Number of Problems |
|---|---|
| Differential Unit problems | |
| Manual Transmission Floor Shifter problems | |
| Axle Shaft problems | |
| Driveshaft problems | |
| Axle Shaft Seal problems |
It has been determined that water has contaminanted the oil in the rear differential causing a mechanical failure. I have been informed that my extended warranty does not cover this issue even though GMC is aware that problem with a vent tube location is one source for water infiltration. Read details...
While driving or accelerating from a complete stop the gear shifter pops out of gear into neutral. This occurred when the rubber boot around the gear shifter handle slides up. The dealership slid the boot back into place but the problem recurred. Read details...
While driving on the PA turnpike the driveshaft fell out of the bottom of the truck and dented various parts underneath the truck. After having the driveshaft replaced a click still occurred with the back of the truck. The mechanic believed it was a problem with the entire back axle. Read details...