Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
The OEM transmission is a GM 4L30-E. It is a computer-controlled overdrive transmission, using the 'optional' gear ratios:
- 2.86:1 1st gear
- 1.62:1 2nd gear
- 1.00:1 3rd gear
- 0.723:1 4th gear
- 2.00:1 reverse
Transfer case ratios - (:1) High: 1.00 Low: 2.48
Axle gear ratios - (:1) Front: 4.30 Rear: 4.30
Common Problems Edit
Often caused by a failing Mode Switch. This will also cause the PRNDL indicator to show the wrong gear, and may store a ???? code in the OBDII diagnostics, although the check-engine light does not light.
May also be caused by a clogged transmission filter.
May be caused by a lack of transmission fluid.