Consumer Guide's® Auto Editors have scoured repair bulletins and questioned mechanics to search for commonly occurring problems for a particular vehicle. In some cases we also give possible manufacturer-suggested solutions. In many instances these trouble spots are Technical Service Bulletins posted by the manufacturer, however, we have our own expert looking at additional vehicle problems.

Automatic transmission: TH-700-R4 automatic transmissions may shift late or not upshift at all. The problem is a stuck throttle valve inside the transmission. (1990-94)

Dashboard lights: The oil pressure gauge may read high, move erratically, or not work because the oil pressure sensor is defective. (1990-93)

Dashboard lights: ABS system problems include false codes, a warning light that stays on, or speed sensor malfunctions. (1990-91)

Engine knock: Continued engine knock on 4.3-liter engines during acceleration or climbing a grade has been addressed by at least 15 PROM revisions due to carbon buildup on the pistons. (1992)

Engine knock: Engine knock when the 4.3-liter engine is started can be eliminated by using an oil filter with a check valve. If this does not work, GM has revised PROMs for the computers and will even replace the main bearings. (1990-94)

This table lists costs of likely repairs for comparison with other vehicles. The dollar amount includes the cost of the part(s) and labor (based on $50 per hour) for the typical repair without extras or add-ons. Like the pricing information, replacement costs can vary widely depending on region. Expect charges at a new-car dealership to be slightly higher.

1990-91: Fuel tank sender seal may be out of position; could result in fuel leakage.

1991: Rear-seatbelt-buckle release button can stick in unlatched position.

1991-94 4WD w/ABS: Increased stopping distances can occur during ABS stops while in 2WD mode.

1993: Rear seatbelts may not meet government requirements.

1994 w/VR4 weight-distribution trailer hitch option: Trailer-hitch attaching bolts were not tightened adequately.