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. (1991-93)

Engine knock: Engine knock is usually eliminated by using an oil filter with a check valve. If this does not work, GM has revised PROMs for the computers. (1991-92)

Exhaust system: The exhaust valves may not get enough lubrication, causing a variety of noises. Usually, the same engine consumes excess oil because the valve-guide seals on the exhaust valves are bad. (1996)

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.

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

1994: Solder joints can crack, causing windshield wipers to work intermittently.