B2usmc

I assume the stock harness wasn't swapped when the computer was? The harness has a 1 wire plug, I think the computer wants to see the f terminal. Good to hear about the tune...I'll probably but the HP tuner. Can I just pull the bulb.for the airbag light...it seems completely unnecessary to me.

Good write up, it's unlikely I'll do that, I'm not confident enough soldering to mess with the circuit board. The battery light is flashing on 10 seconds off 5 continually. Simply put it isn't a 3 wire alternator and the computer is looking for the f terminal that doesn't exist... research says this can be turned of in a tune or I can add a wire (some have success, others don't) to the pcm. Obviously I would rather just uncheck the ses box in the tune... pretty sure I can do the same with the airbag in the tune. I'm happy to buy the hp tuner, but don't want to lose my current tune (not sure how it was tuned before I bought it)

Truck is a 99 Sierra, has 01 Silverado ECU. I have a built 5.3, 228r cam, 4l80, headers, tsp valvetrain...truck runs good. It was tuned prior to me owning it (I assume since it runs perfectly). There are a few things I need to change (airbag light after Escalade cluster swap and stupid battery warning). Do I need a tuner like HP tuners or is there a way to avoid spending that money? I also don't want to get HP tuners and lose the tune that is on it because it runs well and I'm not situated to both buy a tuner and have a custom tune built at the moment.

I have a 99 Sierra with a 5.3. 228r cam and supporting Texas speed springs, ported heads, etc. 4.10 rear end. Also has a 4l80e with adapter harness, a shift kit and 3500 stall TCI converter. My issue: First vehicle with a high stall converter Runs and shifts fine from cold start. Sometimes it doesn't seem to hit OD or maybe 2200 rpm is normal for the rear end/trans combo. When I turn the truck off and restart a few minutes later (warm start) I have to rev it to 3500+ to get it into a gear...also the gear selector switches back and forth while this is happening until the rev makes it "catch", then it drives fine and selector shows either D or R, whatever was selected. I know this isn't normal, but what are my options to fix it? I've had numerous performance cars, but all had manual trans, so I'm a little lost with the automatic. Im reading and learning the concepts, but this issue doesn't seem like it's been addressed. Any help is much appreciated, Bryan Marietta, Ga