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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 7, 2005
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Open Help Requests for GM
Help Request Answers
1998 Buick Regal LS 3.8L MIL Lamp on VIN: 2G4WB52K0W
this regal came in for routine maintaince. replaced plugs, wires, battery, ect. fired it up and ran great. customer picked it up and was back in less than 5 minutes. check engine light on. pulled codes 1361 and 1362. scanner said manufacturer ignition control ... Trouble codes: 1361 (1362 -), 1362
1989 Cadillac DeVille 4.5L Body Control Module VIN: 1G6CD515K4
Folks, This very low mileage, well maintained Sedan Deville came to us with no display in the fuel center or climate control center. My tech diagnosed a bad BCM. We replaced the BCM with a reman unit from the factory. Plugged it in and smoke poured out. Obvio...
1994 Chevrolet Astro CL 4.3L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GNEL19W4R
I know that there are all kinds of problems with these cmfi units, but what is bothering me is the low vacuum at idle. Is this causing a incorrect reading for the map sensor. I have seen the egr vakves act up but this one is showing 0% position and it idles re...
1998 Chevrolet Corvette 5.7L left front abs sensor and and ebtcm module VIN: 1G1YY32G9W
I HOOKED UP MY SCAN TOOL AND FOUND A CODE FOR A LEFT FRONT ABS SENSOR WAS OUT OF RANGE SO I REPLACED IT and cleared the code.went on a road test and light came back on rescand the car and got the same code with another code ebtcm,internal malfunction i went ba...
1998 Chevrolet S10 2.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GCCS1447W
Customer was driving on freeway [65 mph] and the check engine light came on, engine started mising and caughing and lost power but still ran, customer pulled off freeway and shut engine off. After a short time he restared the engine and it ran good, check engi... Trouble codes: P0200 (Injector circuit fault), P0302 (Misfire 2)
2000 Chevrolet Impala 3.8L interior noise VIN: 2G1WF55K3Y
Greetings Techs, Customer noticed an intermittent noise coming from the under dash area on the driver's side. The one time we heard the noise, it sounded like a faint fan motor running at the base of the steering column. With a stethescope, we were able to con...
2003 Chevrolet Trailblazer LS 4.2L front of engine VIN: 1GNDS13SO3
The vehicle has been in a couple of times for a ticking noise from the front of the engine.The noise is only there for less than a minute when it does actually occur.The best I can tell it is most noticeable at the water pump area with a stethoscope.The noise ...
1987 GMC R1500 High Sierra 4.3L No Start, Cuts out, Stall VIN: 1GTCR14ZXH
Truck was towed in from another shop will start but wont stay running, it will run in back up spark and fuel, I noticed all the new parts hanging from this thing so I checked the ecm grounds all good, checked power to ecm all good, unplugged timing connector s...
2001 GMC Savana 2500 4.3L No Start VIN: 1GTFG25W11
intermittent crank, no start. fuel and spark ok. using tech 2 scanner only code which returns is u1016 when i go into passlock system. all powers and ground checked good. does this mean the passlock module is defective?
1997 Pontiac Grand Prix GT 3.8L wet carpet VIN: 1G2WP52K8V
This car belongs to a friend in stcroix US Virgin Islands. He complains of a waterleak which he seems to think is coming in through the passenger door. It only happenes after a heavy rain.He said that he has tried to find it by wetting it with a garden hose bu...
1998 Pontiac Grand Am SE 2.4L ABS light and traction control VIN: 1G2NE12T5W
Car came in with an intermitent ABS light coming on. When the ABS light comes on the ETS off light comes on also. Theses are amber lights no red brake light comes on. There were no codes in the ABS system. I found that the ABS computer would not ground the bra...
2000 Pontiac Grand Prix SE 3.1L ignition key VIN: 1G2WJ52J2J
new to us -key stuck in ingition -replaced cylinder- worked fine for 2 days -then back- 1st.wire is okay between fuse to ign swth-12 volts at btsi fuse when the key is at on position - new column solonoid and ign sw.if you manually push the solonoid the key wi...
2001 Pontiac Grand Am GT 3.4L Misfire, MIL Lamp on VIN: 1G2NV52EX1
Hi all, Need a little help with this Grand Am GT. First concern was for a no start a few weeks ago. Diagnosed as a bad fuel pump. Fuel pump was replaced and ran excellent. Customer took vehicle and returned a week later with Check engine light on and flashing... Trouble codes: P0300 (random misfire)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet C1500 5.7L timing VIN: 1GCEC14R0T
Thanks for all the replies. Sorry for the delay but the customer could not return till this week. After all the tips I recieved, I feel like a fool. The knock sensor was the problem, seeing 'knock' all the time. New sensor all is well. A dumb oversight on my p...
1997 Chevrolet S10 LS 4.3L speedo and transmission shifting VIN: 1GCDT19X2V
Thanks to all the techs that hit this one right on the head. The pcm was infact bad. After checking the PRNDL, the ignition switch and making sure had 12v on pin E (pink wire) at the trans. I had a PCM flashed and took a shot. Thanks to all for your help.
2001 Chevrolet S10 4.3L MIL Lamp on VIN: IGCCS19W21
yes thaanks to all the tsb for the air pump relocation and replacement fixed this one the owner has his emissions slip and off to get this tag thanks again...Chris Trouble codes: P0410.
1995 Oldsmobile Aurora 4.0L water pump VIN: 1G3GR62C3S
i added a 2 ft pipe to my 3 ft 3/4' rachet while helper pride in on socket with bar to hold socket on good then pushed very hard clockwise & it finally popped loose. at first i thought i had broken the socket or housing but didn't. i guess i was being to genti...
2002 Oldsmobile Bravada 4.2L transfer case VIN: 1GHDT13S02
Replaced transfer case with Jasper unit. Thanks for all of the replies.
2000 Other GM COMMODORE VT .0L dash lamps VIN: VT8KV35614
hi all i thank you for your help and replies justin in oz was on the right track i had already tried cleaning connections at abs plug and looking for corrosion ,i traced the faults by disconnecting ecus to find out which one was bringing down the comms the fau...
1996 Pontiac Bonneville SE 3.8L abs VIN: 1G2HX52K2T
hi guys, thanks for all the responses. this vehicle finally decided to cooperate with me. the light started to come on more often. the light started to come on without the vehicle moving. cleared light, started car, left it running while i went inside to do a ...
2000 Pontiac Grand Prix GT 3.8L 1-2 shift and 2-3shift VIN: 1G2WP52K5Y
Bingo,the white cookie monster,under the battery positive side connecter,looks new,and the owner is a mechanic.Said he cleaned the connecter before installing the new battery.Took to 2 transmission shops in town,and both stated needs rebuild.On test drive ,it ...
2001 Saturn SL1 1.9L Hesitation, MIL Lamp on, power loss VIN: 1G8ZH52881
First I want to Thank everyone that responded!!! Many of the replies recommended checking the coolant temp, long term fuel trim, MAP, & many other really good suggestions. In the end I graphed the MAP sensor & found under just the right engine load, it would f... Trouble codes: P0172 (System rich).
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