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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 24, 2009
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Limited 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Surge VIN: 1G4HR52L0S
Hello Fellow Techs, I have this LeSabre that sets a P0341 cam/crank error within about a minute after starting the engine. The first step in the troubleshooting chart says to monitor the cam/crank error counts and see if they rise above 2 and it will go past 2... Trouble codes: P0341 (Cam/Crank Error)
2002 Buick LeSabre Custom 3.8L dic VIN: 1G4HP54K82
Hello fellow iATN-er's, This Buick has a four button drivers information center in the left side of the instrament cluster. Intermitantly the read-out will act up, sometimes saying " door open" other times it will just throw up random letters that don't seem...
2002 Cadillac Escalade 6.0L Rattling noise VIN: 1GYEK63N32
This vehicle belongs to an insurance agent-long drives followed by extended periods of idling. Owner stated 10W-30 filled a couple times, but was caught early on & replaced with 5W-30. Noise sounds like classic loose torque converter bolts (checked good) but w...
2002 Cadillac Escalade 6.0L Charging VIN: 1GYEK63N32
Help!!! I have owned this Escalade for 4 years now personally...It has always had this problem and seems to be getting worse...It has always killed the battery if it set for more than a week...I have replaced the battery a couple times and checked all the usua...
1970 Chevrolet CORVETTE 7.4L windshield wipers VIN: 194370S409
i have a 1970 vette that has had about 80% of restoration done before showing up here.wiper switch plate is lying in car not hooked up.wipers inop.wiper cowling is not installed.12 volt power wire to wiper motor is good but the wiper motor is bleeding 12 volts...
1993 Chevrolet K2500 Cheyenne 6.2L Excessive Emissions, MIL Lamp on VIN: 2GCFK29C6P
Greetings GM diesel techs. This 6.2 came to us a couple of weeks ago with a misfire on the #4 cylinder which turned out to be a broken exhaust valve spring. Did a compression test on all cylinders [ok] and a leak down test on #4 cylinder to confirm that valve ...
1998 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GCEC14W8W
thanks for taking the time to read my posting.truck came in with above codes.miss code was a bent plug electrode on #4.cleared codes seems to run okay but idle at 1200 rpm.manually worked iac and it would get stuck.sprayed for vacumm leaks and found none pinch... Trouble codes: P0101, P0108, P0304, P0507
1999 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R3X
Vehicle was previously serviced for EGR codes with a replacement EGR valve from NAPA. Came back with MIL, p404 Digital EGR system open performance. Replaced gasket with screen gasket. Came back, while checking valve for malfunction, ear broke and valve was rep... Trouble codes: P0404
2000 Chevrolet Blazer LS 4.3L 2-3 Shift VIN: 1GNCS13W8Y
Thanks in advance for any help on this. This vehicle came to me through a trans shop. So far I have verified that the computer commands 2-3 shift solenoid as well as solenoid is working. I back probed the wire @ PCM and watched while driving vehicle, voltage w...
2000 Chevrolet Monte Carlo SS 3.8L No Start, Cuts out VIN: 2G1WX12K0Y
Hello guys, We have this car here that will quit at high way speeds 110 km it is like the key was shut off. will crank but not start untill codes are cleard. The only code in the computer is P0101. We have not been able to get the car to quit in the shop. Ther... Trouble codes: P0101 (Massair system performance out of range)
2003 Chevrolet Trailblazer North Face 4.2L T-Case, Diff, Trans??? VIN: 1GNET16S83
Hi all! Long post... Pulling our hair out on this one. This vehicle makes a noise when in All Wheel Drive or Full-Time Four Wheel Drive, worse in Four Wheel Drive. The noise is lighter than a howl but denser than a whine. It is worse on deceleration. It al...
2004 Chevrolet Malibu LS 3.5L fuel guage VIN: 1G1ZT52824
Gentlemen, This car came in with the fuel guage dropping to e and the walk light comes on. If you turned the ignition off and back on the fuel guage works fine. Replace the switch and the guage work but sometimes goes from 3/4 to full and back. Any help would ...
2004 Chevrolet Tahoe LS 5.3L Electronic VIN: 1GNEK13Z84
Hello Fellow techs.I have this vehicle that came in with traction control system disabled message on dash.Traced that problem to a bad BPMV replaced it but not the ebcm for it. The system was working fine but now the customer complaint is on dry pavement when ...
1994 Geo Prizm 1.6L Speedo VIN: 1Y1SK5363R
I replaced the speedo/odometer assembly because of a broken trip odometer. Not realizing that it wasn't necessary, I removed the speedo needle during the repair. Now the speedo jumps up to 10 mph from a stop and consistently reads 7-10 mph higher than actual s...
1998 GMC K3500 Sierra SL 6.5L valve train VIN: 1GCHK33F0W
Cust complained of noise in motor area.Verified noise from air cleaner box/Intake noise.Thought was plastic retainers or valve springs busted,removed intake and covers and inspected all looked fine,cust said put back together and he'll drive 1 month later nois...
1995 Oldsmobile 98 Regency Elite 3.8L Cuts out, Stall VIN: 1G3CX52K4S
good day my friends need your help,car came in stalling at times and ses light on,scanned had 4 codes checked p0342 first no cam magnet broken and egr valve inop replaced above parts then fun began.started up ran [...] then stalled started right up and ran ... Trouble codes: P0342, P1406, P0401, P1860
2001 Oldsmobile Intrigue GX 3.5L Surge, Stall VIN: 1G3WH52H61
when the vehicle gets to operating temp is when problem occurs usually when taking off with light acceleration the engine will stall but starts right back up some times has extended crank i can usually get it to stall in the garage with a light brake torque an...
2000 Pontiac Grand Am SE 2.4L cooling system VIN: 1G2NF52T1Y
hello,and thanks in advance for any input.this grand am was brought in 1 month ago for an ongoing overheating problem. at the time, cooling systen was operating properly,we tested for hc's,pressure tested,road tested,and sent it on its way.we were hoping the p...
2002 Pontiac Bonneville SLE 3.8L No Start VIN: 1G2HY54K52
This vehicle was towed in for a no start. I have checked fuel pressure, injector pulse and spark, they all check good. I have also checked compression that too is good. The problem is the spark plugs are getting fouled out with fuel when you try to start it. A...
2005 Pontiac Vibe 1.8L No Start
may have two problems or both related. First battery is dead, jump started pulled it in shop checked charging system was charging at 14.5v. Turned car off,went back to it later it would crank over but not start, hooked up scan tool had no communication to comp...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Century Custom 3.1L power steering VIN: 2G4WS52J9Y
i received many replies and most of them stated it was the rack and pinion unit. i took the advice and replaced the rack and pinion unit and flushed the system. the car operates great
1984 Chevrolet C10 Suburban Silverado 5.7L not sure VIN: 1G8EC16L9E
Ok guys good advice from several guys all advice was relavant thanks for the prompt replies. I went into work this morning got my brother the "master tech" to ride with me while I drove, even though we could definately feel-hear it under our feet- as some of y...
1996 Chevrolet Corsica 3.1L MIL Lamp on VIN: 1G1LD55M9T
Well I wanted to wait a fee days before I responded with a fix. So far no more problems. I first decided to replace alt. because it was needed, and yes the alt was on the same circuit as the heaters. Before when I would turn ign on the 02 sensor heater showed ... Trouble codes: P0141.
1997 Chevrolet K1500 Cheyenne 5.7L steering box VIN: 2GCEK19R2V
Well as everyone said the sensor at the base of the steering column was bad. This was a recently purchased used vehicle with aftermarket warranty. Warranty company denied claim/used car dealer won't pay,clientwon't pay so I am stuck with a truck. Anyone want c...
1997 Chevrolet K3500 Cheyenne 5.7L very high idle VIN: 1GCHK33F6V
2004 GMC Sierra 2500 6.0L Differential VIN: U041218916
Well folks, sorry for the long wait, but the additive was installed and I had to wait to hear back from the customer who was away on vacation. Unfortunately the noise is still there. It is actually getting worse. It has advanced to the tradition posi chatter w...
2006 GMC Sierra 1500 SLE 4.8L MIL Lamp on VIN: 1GTEK19V56
I'm Closing For Now. I Haven't Fixed It Yet. I'm Going To Get The Vehicle Back & Double Check My Testing Before I Decide What To Do. After The First Set Of Tests I Would Say PCM. I Will Add To This When The Repair Is Actually Done. Thanks For The Replies. Trouble codes: P0449 (EVAP Vent Solenoid Valve).
1994 Oldsmobile Silhouette 3.8L No Start VIN: 1GHDU06L0R
Went back and checked primary coil resistance and found 0 on two coils other one was around 1 ohm. TRied removing one coil at a time until fuse stopped blowing. Test light idea was a no go due to module always produces a ground path with high resitance. Remove...
1997 Pontiac Trans Sport 3.4L Taillights and dash lights VIN: 1GMDU03E5X
THanks to John and the others for put me back on the basics trail sometimes I get to used to using a scan tool. Anyway the dreaded headlight switch was the problem and is replaced and everything is back to normal. Just remember the basics then go big. Thanks a...
2001 Pontiac Bonneville SE 3.8L steering gear VIN: 1G2HX54K12
Thank you very much for all the help with this 1.Every day seems to be a learning experience.I had ck'd ball joints 2 times but Ed from Minn said he had 1 with side to side problem so while on alignment rack we moved vehicle forwad and backward and after 5th t...
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