Are you trying to put a manual in the '99? That requires a different PCM or a reflash of what you have, among other things.
Additionally, except for the NV4500 which wasn't used on 4.3 motors, no 5 speed transmissions are very strong, so may not hold up for long behind a more powerful motor.
Answers & Comments
Verified answer
Are you trying to put a manual in the '99? That requires a different PCM or a reflash of what you have, among other things.
Additionally, except for the NV4500 which wasn't used on 4.3 motors, no 5 speed transmissions are very strong, so may not hold up for long behind a more powerful motor.