The 1989 model year market the release of the Sport package for shortbed regular cabs, and the Z71 off road package. Only available on K1500s, the Z71 package included skid plates, Bilstein shocks, and Z71 decals. Pickup trucks still remained the only body styles available in the GMT400 platform.
Here you will find specifications and information for 1989 model year Chevrolet and GMC full-size trucks.
This includes engine ratings, drivetrain specs, and chassis dimensions.
Engines
| RPO | Engine | Power(hp) | Torque(ft-lb) | Notes |
|---|---|---|---|---|
| LB4 | 4.3L (262ci) V6 | 160 @ 4000 | 235 @ 2400 | Below 8600 GVWR |
| LB4 | 4.3L (262ci) V6 | 160 @ 4000 | 235 @ 2400 | 8600+ GVWR |
| L03 | 5.0L (305ci) V8 | 175 @ 4000 | 270 @ 2400 | |
| L05 | 5.7L (350ci) V8 | 210 @ 4000 | 300 @ 2800 | Below 8600 GVWR |
| L05 | 5.7L (350ci) V8 | 190 @ 4000 | 300 @ 2800 | 8600+ GVWR |
| L19 | 7.4L (454ci) V8 | 230 @ 3600 | 385 @ 1600 | |
| LH6 | 6.2L (379ci) V8 Diesel | 135 @ 3600 | 240 @ 2000 | Below 8600 GVWR Manual Transmission |
| LH6 | 6.2L (379ci) V8 Diesel | 140 @ 3600 | 250 @ 2000 | Below 8600 GVWR Auto Transmission |
| LL4 | 6.2L (379ci) V8 Diesel | 150 @ 3600 | 265 @ 2000 | 8600+ GVWR |
Manual Transmissions
| Model | 4-SPEED SM465 | 5-SPEED W/OVERDRIVE |
|---|---|---|
| RPO | MM4 | MM5 |
| Synchronized Speeds | 2/3/4 | 1/2/3/4/5 |
| First | 6.55 | 4.02 |
| Second | 3.58 | 2.32 |
| Third | 1.70 | 1.40 |
| Fourth | 1.00 | 1.00 |
| Fifth | – | 0.73 |
| Reverse | 6.09 | 3.74 |
Automatic Transmissions
| Model | 3-SPEED TH400 | 4-SPEED w/OVERDRIVE 700R4 |
|---|---|---|
| RPO | MX1 | MX0 |
| First | 2.48 | 3.06 |
| Second | 1.48 | 1.63 |
| Third | 1.00 | 1.00 |
| Fourth | – | 0.70 |
| Reverse | 2.08 | 2.29 |
