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Re: Keyless remote programing GMC 1998
At the data link connector, (under the left side of the dash) use a fused jumper wire between pin 4 (Black) and pin 8 (black/white). Door locks should cycle, lock then unlock.
Press and hold the lock and the unlock button on the remote at the same time about 15 seconds. You will hear the door locks cycle again.
Repeat the last step for any remaining remotes. (All remotes to the vehicle must be programmed at this time)
Remove jumper wire and test remotes to make sure they programmed.
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