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Prev Professional Automotive Repair Technical Discussions for May 15, 2007
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L communicatio VIN: 1G4HR54K3Y
The vehicle was driven to our shop with a lot of dash warning lamps on and several accesories not working. The components that are not working are a/c compressor, radio, door locks, all gauges are dead, no power to cigar lighter and there are no interior light...
1994 Chevrolet C3500 5.7L 2nd Only VIN: 1GBJC34K7R
Hey Guy's and gals, look this 3500 is funney we had taken it on for repair but the customer has had every thing done i think what's left. The Trans will not shift al all and the code i am getting is a 66, 85 and a 67 all for the trans i have looked it over and...
1997 Chevrolet Blazer 4.3L abs VIN: 1GNDT13W5V
Hello everyone, I need a little help on this one. This vehicle came to us with a intermitant ABS light and when the light comes on (usually after 10 miles of driving) the transmission will not up shift (like its in limp mode). I can shift it manually. I used t...
1997 Chevrolet Venture 3.4L child safety VIN: 1GNDUO6E1V
I know this seems like a very simple help request but due to what is at stake, I need to be sure of what I am doing. This is my own personal vehicle and I need to know where to install the tether bolt for a front facing child seat in this van. The owners manua...
1998 Chevrolet K3500 Cheyenne 7.4L Misfire, MIL Lamp on VIN: 1GCHK33J7W
This truck came in with the ses light on and complaint of rough idle. P0171 fuel trim system lean bank 1 and P1133 insufficient switching bank 1 sensor 1 were stored codes. Freeze frame showed bank 1 LT trim to be around 100 counts and bank 2 LT trim to be aro...
2000 Chevrolet Cavalier 2.2L a/c clutch VIN: 1G1JC1246Y
a/c clutch does not power up on own. if i jump relay or ground dk grn/wht wire with relay in, it works, but no fan control. using scanner to command a/c relay on/off it does not work. check dk green/whire wire from relay to pcm for opens/shorts, wire is ok. it...
2002 Chevrolet Silverado 2500 HD 8.1L MIL Lamp on VIN: 1GCHK29G32
I was wondering if anyone has run into this problem before. I have a code P0343(CMP signal to high) I am not familiar with this system. There are two values on my scanner that read CMP low to high & CMP high to low signals. Both numbers keep increasing up to a... Trouble codes: P0343 (CMP sensor signal to high)
2001 Hummer H1 6.5L No Start VIN: 137AZ83371
The vehicle came in with a hot start problem that occurs intermittently. The codes listed below were in memory, but the MIL was not on. I have not been able to duplicate the problem so far, but another person in the shop had a hard time starting the vehicle wh... Trouble codes: P1641 (No valid info.), P1643 (Wait to start circuit), P1654 (No valid info.)
1993 Oldsmobile Silhouette 3.8L No Start VIN: 1GHDU06L2P
van towed in from another shop for no start.they replaced crank sensor, ign module and computer.i started checking sys. found ign harness from icm to main harness shorted together. replaced harness with used one.still no start.i have no spark and intermittant ... Trouble codes: 66 (a/c pressure sensor prob.), 67 (cruise switch fault), 68 (cruise command prob), 69 (high pressure switch)
1996 Pontiac Grand Am SE 2.4L No Start, no spark VIN: 1G2NE12T9T
hello all...i have a 1996 pontiac grand am with a 2.4L and it has a no start problem its getting any spark...i have injector pulse and i have checked with the modis and it says cam and crank sensors are in sync.plug boots,ignition module and spark plugs have b...
1998 Pontiac Trans Sport Montana 3.4L Tachometer VIN: 1GMDX03E5W
Vehicle came in with complaint of tachometer not operating. We scanned the computer, no codes were found. The rpms were reading properly on the Mastertech. Checked power and ground to IPC and checked the wire from the PCM to the IPC tachometer and found good c...
2000 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E0Y
hey, i have a problem with this grand am it has gone through two fuel pump relays in the last year and now it needs another one. was just wondering if anyone has seen this occur. this is an extremely intermittant problem, like i said it has been at least six m...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick LeSabre Custom 3.8L actuator VIN: 1G4HP54K65
Thanks once again every for your help. As it turns out, the problem was not that it was low on freon. Rather it turned out to be orifice tube that was restricted. Replaced tube and flushed system, works great. Jaime
2000 Cadillac Seville STS 4.6L Alternator VIN: 1G6KY5490Y
Thanks to all who replied. The problem did indeed turn out to be two bad reman. alternators, right out of the box. Bruce from Florida said he only uses new AC delco when possable. He seems to be on to something. A new AC delco fixed the problem.
1994 Chevrolet K2500 Suburban 6.5L Stall VIN: 1GNGK26FOR
Thanky, Thanky, Thanky, every one! A bunch of folks were sure it was the pump, Jim and Larry had good suggestions on an aftermarket pmd cooler kit which relocates the pmd to a cooler spot mounted on a heat sink. Shawn and Jeffery suggested mounting a temporary... Trouble codes: 35 (long inj pulse), 36 (short inj pulse), 29 (glow plug relay problem).
1994 Chevrolet K2500 Cheyenne 6.5L Poor Fuel Economy VIN: 1GCFK29S8R
thanks to all replies. now i know and understand the purpose of this fuel line.replaced with rubber line now all is good.thank all of you.
1996 Chevrolet G30 Beauville 4.3L engine performance VIN: 1GCGG35Z0T
I want to thank you all for your replies. I put a new cap and rotor on it and voila, it works great. I looked at the cap adn rotor and didnt see anything visible but the change did wonders. Thank you all
1997 Chevrolet Tahoe LS 5.7L compressor VIN: 1GNEC13R2V
Thanks to all that replied.Ron from Texas was correct.There is no power going to cycling switch,it provides ground.Normaly you can tap on switch and a/c will start working but this was not the case on this vehicle,which in turn threw me off course plus the fac...
2001 Chevrolet Astro LS 4.3L Misfire, MIL Lamp on VIN: 1GNDM19WX1
We got this one fixed. We ended up reprogramming the PCM . We then performed the case relearn procedure. The van runs like a charm. Thanks for all you guys for taking your time to help me out, I could not have it fixed without ya'll, its very great and helpful...
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1ND52J61
thankyou for all your replies. customer finally brought car back. we ran an injector cleaner and it seemed to help some, next we ran an injector balance test and found inj 5 still having issues. convinced customer it was the only way and replaced the injector.... Trouble codes: P0304.
2003 Chevrolet Suburban 1500 LT 5.3L No Start VIN: 1GNFK16Z23
Thanks for the great responses, in response there was no trouble codes stored in any of the computers, while it was acting up and cranking you could wiggle the key and get it to start indicating that there was a problem in the lock cylinder, we replaced the pa...
2002 GMC Savana 3500 6.5L power steering pump & hydraulic brake booster VIN: 1GDJG31F52
Thanks for the input on my power steering issues. We checked very carefully for any air leaks in the system and found none. Checked the cooler and other lines for problems.. none found. We blew out all the lines and then changed out the pump assembly and after...
1989 Pontiac Grand Am SE 2.0L Stall VIN: 1G2NW54MXK
Thanks for all of the replies. I installed the TCC solonoid assy. and it seems to be working fine. It was an intermittent problem so we will hope for the best. So far so good.
1995 Pontiac Grand Am SE 2.3L Poor Idle Quality, Misfire VIN: 1G2NE15D2S
thanx to everyone that offer such great advise. i replaced the coil cover and the symptom went away. i did't think of that at first due to not visually seeing the carbon tracking, now i know. thanx again.
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