how to tell if BCM replacement?

Just because there is tape on the bcm wires doesn't mean the bcm was ever replaced. Post a picture of your old bcm with the used bcm. Does your gas gauge work? When you replaced the bcm with a used one did you relearn the pass lock sensor? If not the car won't start with the bcm you swapped it with.

the car seems to idle low and want to stall, there is a piece missing that attaches from the exhaust manifold to the intake manifold and I would like to know what its called. i went to Auto zone and they had no idea.

Does it hook below the egr valve on the intake manifold?

Heat/Cold air doesn not blow out .Service wrench light, Service Engine Soon, ABS, and Air Bags flash on and off. Also, speedometer, fuel and temp guage erratic. I explained the signs to 3 mechanics. Clicking noise, ignition off. Diagnostics 2x. One said I needed an alternator ($578 for part/labor). The other a tune-up ($450 for Ignition coil/spark plugs and labor) due to misfires detected. Wasted hard earned money on their BS. Eventually, had a tune-up elsewhere at a much lower price. Problems above persist. The last mechanic, stated it could be car's BCM. If so, they don't deal with issue. Signs of BCM problem? What and Where should I go? Cost? I live in Phila, PA.

here is a picture, passenger side by the firewall toward the front

The temp and gas gauge erratic sounds like a bad BCm really common on those cars.Do you have auto climate control?Also what are the exact code numbers you have not code descriptions?

other pictures

No auto climate control. My 2nd Diagnostics/trouble shooting pulled up P0300 Engine Misfire Detected and PO305 Cylinder 5 Misfire Detected - not much else.

Thats what i thought its the egr tube that runs from the exhaust manifold to the egr valve.Pick a part www.parts.com i would go to that site and get the phone number call them and tell them you want the egr tube like i said.Also the dealer or ebay.

Are those the current codes after the major tune up or after?Has the ac charge and pressures been checked?

thank you, I called the dealerhip and they said gm was out of stock and the dealershipe in the area, I went to parts.com and I wasnt sure if the part i looked up to order was the right one

Prior to tune - up, mechanic pulled codes from computer dx. test. AC/Heat, blower resistor shot. The rest, not checked. Again, could it be BCM causing erratic changes (Service Lights/Erratic gauges)?

Thats why i said to call parts.com they will help you find the correct parts.I have ordered parts from them a couple of times there really nice and get you the correct parts.

As far as the temp gauge gas gauge erratic yes I have bad bcms do that also power door or keyless entry inop yes as well.Not being able to get out of park head lights coming have seen bad bcms do that as well.Does the blower fan work on all speeds? Does the ac clutch kick on when turning the ac on?

thanks for all your help. The part was there, I didn't see it. The tube moved up to screw it in, I didn't realize it. However, I took the battery out to charge it over night and now the car won't start so I don't know if that has something to do with it. I'm frustrated now so I'm getting it towed to the dealership. I'm thinking the new bcm does need to be programmed.

I can get in out car without a problem. Signals work. The warning signals/guages erratic. My fan doesn't blow hard (resistor shot). My AC button doesn't light up anymore. Car sounds like crap (loud) when I pull off, then settles down. Where should I go to BCM problem? If I don't get the problem fixed right away, what will happen?

Before you have it towed did the car start as soon as you put the used bcm in?Also is the security light on while it doesnt start?Does it crank no start?

Sounds like a bcm for the gauges etc bad bcms are comMon for those they don't cause the car to run bad though.A bad bcm can lead to a no start though.I would have it diagnosed for a bad bum and start there.also get some current codes read from the computer.

it started as soon as i put the new bcm in. all the lights are on. it just chokes. The old bcm, it starts and then shuts right off

Should I take it to a dealership for service? It seems like the mechanics in the area don't have a clue when I explain the issues. What is the procedure to dx problem? Cost for dx and replacement?

Is the security light on solid or flashing while it doesnt start?

The bcm lists for 431.34 to put it in with programming figure 2hrs times shop labor rate for diagnosis figure at least 1hr times shop labor rate.The way I dignose bad ones is I have tester bcms for all the years from the ones I have replaced I labeled what they did and compare how they work compared to the one in the car.I would have the dealer do it.

its flashing

Follow the pass lock relearn i posted let me know what happens.

it worked, thanks. it's shifting gears hard. It's an automatic

Your welcome have the computer scanned for codes and let me know the exact nunbers you have if you have any not the code descriptions.

will it contiue to start or do I have to take it to the dealership so they can scan it or whatever?

It should continue to start are there any warning lights on?Iam worried about the hard shifting.Take it to the auto parts store and have them do a free code scan let me know the exact code numbers.

no warning signs. It has shifts rough from 1st to second at 4000 rpm, but seems to do a little better after driving for a bit.Accelerates slow at first also. The car hasn't been driven in awhile and I'm just getting it tagged today, so I can get it over 35

I would still have it scanned for codes keep me posted on what you find.