1990-1994 GMC Jimmy: Reliability
Updated: 11/23/08
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Our reliability study for this generation GMC Envoy includes details on average repair costs, manufacturer recalls, and everything you need to know to gauge the long-term reliability of this generation GMC Envoy .
Trouble Spots
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:
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)
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)
Consumer Guide® Estimated Repair Costs
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.
| Item Name | Repair Cost |
| A/C Compressor | $365 |
| Alternator | $195 |
| Automatic Transmission or Transaxle | $735 |
| Brakes | $210 |
| Clutch, Pressure Plate, Bearing | $390 |
| Exhaust System | $405 |
| Radiator | $415 |
| Shocks and/or Struts | $275 |
| Timing Chain or Belt | $205 |
| Universal Joints | $160 |
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