Re: 97 Bonneville Transmission Issue: Reprogramming TCU
That vehicle does not have a TCM, it has a pcm which controls the engine and transmission. The computer will relearn the values, just undo the battery negative cable for 1 minute. Reinstall and let the car idle for a few minutes and then drive a few miles gently.
I'm a GM tech and I own a very similar car and it has a very similiar issue, but with 184,000 miles i just let it slide.
As far as taking it to the dealer, it is unlikely that there are updated calibrations for this issue, either you guys fixed it or you didn't.
Let us know.
95 Sonoma Ext Cab 4.3L 5spd, Dual alts Tenney 270 amp alternator and 240 amp H.O.alts, 4 DEKA AGM batteries
Pioneer deh8400 rsd250.2 powering Infinity Kappa60.5 comps and Morel coaxials
7.2 cube net wall 2 crossfire XSv215s and 4 bb2400.1s.
Daily Driver: 1995 Buick Park Avenue "leather couch on wheels"
JVC KD-HDR60 Aura RPM2300 on Opti5.1 comps and Planet Audio zr300.4 bridged on Morel Ultimo 6X9's
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