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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 8, 2009
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Open Help Requests for GM
Help Request Answers
2001 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP54K21
Guys help me out here, I have a p0440. Gas cap loose displayed on ip. Previously replaced purge seleniod, gas cap. evap vent selonoid. I am loosing pressure at the vent seloniod, if I clamp that off it holds vacuum. Now I have 12v at the vent seloniod all the ... Trouble codes: P0440
2005 Buick Park Avenue 3.8L Blower motor VIN: 1G4CW54K05
Hello everyone! I'd like to thank everyone in advance this one really has me scratching my head. Customer complains that blower motor does not blow every now and then. That it has been getting worse over the past 3 weeks. Vehicle shows up with the blower worki...
2002 Cadillac Seville STS 4.6L Axle seal VIN: 1G6KY54942
Replaced left axle seal with new seal still leakin. Any help would be appreciated.
1971 Chevrolet Corvette 454CID starter,flywheel VIN: 194371S117
This 71 Vette presents with the complaint of repeated starter failures, he has had stock rebuilds, speed shop hi-torque etc. replacements. I disconnected the battery and manually powered up the solenoid to engage the starter pinion into the flywheel ring gear....
1987 Chevrolet G20 Chevy Van 5.0L Excessive Emissions VIN: 1GCEG25HOH
to all u gm techs, I have this van that seems to run a little on the rich side I replaced 02 sensor for a code 45 concern and truck still seems to run a little rich Trouble codes: 45 (oxygen sensor)
1993 Chevrolet K1500 Cheyenne 5.7L Cuts out VIN: 2GCEK19KOP
Most recently in February, the vehicle came in with a no start condition and we found the pick-up coil in the distributor to be bad. Since it had a gang of miles on it we replaced the entire distributor assembly. Vehicle has been fine until recently. As you dr...
1994 Chevrolet K2500 Cheyenne 7.4L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GCGK29N2R
Hello all This truck is killing me it will stall right after starting and has low power all the time we performed a full tune up due to burnt plug wires. it will run with the map sensor un pluged or with the return line closed with vicegrips when pinched off t...
1994 Chevrolet Camaro 3.4L Poor Idle Quality, High Idle VIN: 2G1FP22S4R
Hello all I have this camaro here that i replaced the engine in 2 months ago a week later I regasketed and replaeced the cylinder heads in good faith to the customer after one of the head bolts were broken allowing coolant into the valve area. The car is back ... Trouble codes: 35 (Idle Control Error)
1999 Chevrolet Blazer 4.3L blowermotor VIN: 1GNDT13WXX
hi all iatn tech i had 99 blazer automatic a/c system car came in blowermotor not working i had check 3 wires go in module the orange 12v. all time blackis ground and purple/white 5v.signal from electronic climate contrl module there is power go in the blower ...
2000 Chevrolet Venture LS 3.4L cruise VIN: 1GNDX03E54
Hello and thanks in advance for all replies. This is a venture van that came in with the cruise inop. I checked power and ground which was good. I checked all other circuits(on\off, r/a, and set switches) and they checked fine. according to the scanner the cru...
2003 Chevrolet Impala LS 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 2G1WH52K23
Hello fellow techs, This car was on a road trip when the customer noticed a lack of power and a check engine light.At one point the car would barely go 50 mph.The check engine light started to flash and they shut the car off. It would not restart and was towed...
2005 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHC23275
Hi all Diesel Techs. Truck in for problem won't start after dring about 20 miles, did TSB (Engine harness connectors) drove it, still the same problem, has no ideas what else to check, please advise, thanks.
2006 Chevrolet c8500 8.1L Misfire, MIL Lamp on VIN: 1GBM8C1GX6
this truck is a propane delivery truck that was converted to run on propane. this truck came in yesterday with p0200 (injector control circuit) set. we cleared the codes, and let him drive it, because he had deliveries to make. he brought it back in today, bec... Trouble codes: P0200
2006 Chevrolet HHR LT 2.4L lock cylinder/key VIN: 3GNDA23P66
To the Greatest Group of Auto Technicians in the World. I am not familiar with working on this HHR. The problem we have is that the ignition key got stuck in the lock cylinder. It would not turn to the off position. We were able to remove the key by pushing to...
1998 GMC C3500 Sierra SL 6.5L noise VIN: 1GDKC34F5W
This city service truck recently had a new clutch installed by the city, but following the clutch installation, the transmission is very noisy when the clutch is engaged with the transmission in neutral. This same "bad bearing" noise is heard in 1st, 2nd and r...
1998 GMC K3500 Sierra SL 6.5L front axle VIN: 1GTHK33F7W
thanks everone for you help! This is a intermitant problem. the four wheel drive works at times. the front axle does not engage at times. When in the shop is has always worked. I replace the actuator and worked good on the lift. went for a test drive worked. A...
1997 Pontiac Bonneville SE 3.8L starter VIN: 1G2HZ59K3V
Hi Guys, I have this 97 Bonneville that will not crank with the key, but cranks if you jump the starter solenoid. With the key ON and if you jump the starter solenoid it still will not start just cranks. The security light on the dash is on, I'm thinking it ha...
2004 Saturn Vue Red Line 3.5L tcc VIN: 5GZCZ63474
at 45-50 mph tcc cycles on and off about every 2-3 seconds. it has over heated converter causing shudder. tcc pressure control solonoid is at 460 milliamps when shudder occurs. at speeds over 50 tcc pressure control solonoid is above 900 milliamps and no shudd...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick Century Limited 3.1L Electronic VIN: 2G4WY55J31
well after checking power and grounds to the trans we found we lost power the the yellow wire in the plug for trans so we checked harness from the trans to the ecm and found a spot where the wire had rubed on something metal and cut it in half . thanks to all ...
1996 Chevrolet Blazer 4.3L Hesitation, Cuts out VIN: 1GNCT18W4T
Thanks for all the replies! Most said to replace fuel pump which I did...again. That did not fix the problem, I then went to the injectors and fuel meter which made this thing run like a new one! I was in denial about the injectors because this thing ran ok wh... Trouble codes: P0131, P0151, P0155, P0420.
2000 Chevrolet Cavalier 2.2L Hesitation, Surge, Stall VIN: 1G1JC52427
Fix was flipping crank gear over. No excuse. Been there done these. They are as simple as they get to line up. Ok, I was fishing a bit to see if anyone could tell with the compression numbers I provided if they could diagnose the mechanical problem. I stil...
2003 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1FTSX21Y06
Basically not knowing what to do next and based on the lean condition on Bank 1, we went with Fuel Supply. We changed the Injectors and the truck runs perfect. We have not seen this before ... is there some way to objectively test for injector flow ? Peter... Trouble codes: P0300.
2003 Chevrolet Astro 4.3L Fuel Gauge VIN: 1GNDM19XX3
Well I got some gray hair on this one, after figuring out the power wire did not come from the PCM, I started testing the pink wire from the relay center to the steering column and found a bad splice behind the fuse box about four inches from the connection @ ...
2000 GMC Jimmy SLE 4.3L lack of power VIN: 1GKCT118W2
Thanks for all the help. a litle more info pryot to this problem there where outher issues I found out car has had a missfire for about six months. two weaks ago had a no start,it was an open coil power wire. it turned out to be a couple of problems. the fir...
2003 GMC Sierra 2500 HD 6.0L Starting VIN: IGTHK29U73
Hello again, I am extremely embarrassed to report that one of the pins at the lower connector on the NEW range switch was bent flat over!!! I should have looked at the other shops work first but I did not. When we did look we could see that the connectors see...
1995 Pontiac Firebird 3.4L Cuts out, lacks power VIN: 2G2FS22S8S
The customer declined any further repairs. After doing some testing I found that the engine is running too rich at 2500rpm and above, While monitoring engine vacuum during this condition, vacuum was at 0hg. My next step is to check the injectors and possible c...
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality VIN: 1G2NE52M4V
PCV valve was the problem, psv worked fine when cold but it was getting stuck once the engine warmed up. Pcm was able to compensate in drive, but in park IAC count was limited and pcm could't do much to compensate for big internal vacuum leak that could not ...
1999 Saturn SL 1.9L fuel gauge VIN: 1234QD6612
Sorry about updating the fix, Took the dash back off and wound the guage needle 1 turn clockwise and just a little past so it would sit against the stop . Put back in and it's been fine since. I actually did the same to my wife's olds intrigue when someone jum...
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