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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 11, 2008
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Fleetwood 5.7L heater VIN: 1G6DW52P8R
below 50 degees car has to be driven about 20 plus miles before any kind of heat. above 50% it seems to be enough but below it not nice. Cust. said heat use to smother u out of car. i really could use some insight on this one. customer really loves this car!
1993 Chevrolet C1500 Cheyenne 4.3L cooling system VIN: 1GCEC14Z7R
customer brought truck in for coolant leaking (crack in plastic tank)replaced. a few days later come back for "temp gauge climbs to 210 deg.then a sudden drop to 170deg.then back up to 210deg and back down to 170deg.i then verified complaint=sure enough temp i...
1994 Chevrolet K1500 5.7L No Start VIN: 2GCEK19K3R
Afternoon, All. I have a k1500 Chev 5.7L in the shop that will not start when it is cold (below 35 degrees), has good spark, and the injectors are spraying gas.There are no codes, history or present. Tried to prime with gas, still no start.Once it warms up,(af...
1998 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1GNCT18W4W
i have a 98 blazer with cel light on custemr complant was it runs ruff i tested for the injectors and found that # 2 and 5 did not afect the way it ran so i replaced the injector sistem with the new and inproved ones from deler did not help replaced cap after ... Trouble codes: P0300
1998 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GNDM19W6W
Hey guys, This van came in with the speedometer not working. The scanner VSS reading was all over the place. We checked the VSS output at the sensor and it was reading proper. We checked the reading again at the end of the harness going into the ECM and again ...
2001 Chevrolet Silverado 1500 5.3L Cruise control VIN: 2GTEC19T41
Cruise control inoperative. Follow GM trouble tree in Service Information (Documents 678460 & 672571). All tests pass except for the last test, confirming a speed signal input at circuit 817. This circuit has a stead 5 volts on it. Wiring diagram shows the spe...
2002 Chevrolet Silverado 2500 HD 6.6L engine VIN: 1GCHK23152
this chevrolet uses about 3 quarts of oil a week if it is run every day which it usually is it does not leak any oil and does not smoke. I have run indicator die through the motor and tried to spot a leak and have not found one.
2004 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 1GCEC14V44
vehicle came in for mil lamp on dtc p0300 stored, and mil flashing. tech 2 misfire graphic show misfire on cyl #s 1 and 6. checked plugs,they were okay. changed positions with cyl #6 to cyl #4 and from cyl #1 to cyl #3. still had problem. changed wires next fr... Trouble codes: P0300
2004 Chevrolet Malibu 3.5L door lock remot VIN: 1G1TZT5489
how can you program new remote key fob?
2005 Chevrolet Silverado 3500 LS 6.6L Air in Cooling System VIN: 1GBJK34225
Hi, First off, I haven't worked on many of these 6.6L's, lots of other diesel work though. What I have is a cooling system that seems to get air in the system only when cold. I have repeated tested for blown head gaskets and found nothing. I have pressure test...
2006 Chevrolet Trailblazer LT 4.2L Alt VIN: 1GNDS13S66
Customer brought truck in a few days with noise in engine.We check it & noise sounded like bearing noise coming from Alt. Customer took it home & removed Alt & took it to rebuilder & had bearings & brushs replaced. Rebuilder said Alt was not the problem. He br...
1994 Geo Metro XFi 1.0L mil VIN: 2C1MS2461R
Does anybody know where exactly the maintenance reminder switch is on this Geo Metro XFi? Thankyou!
1996 GMC K1500 Suburban 5.7L compressor clutch VIN: 1GKFK16RXT
Hello, I am an instructor at a local high school. We are discussing air conditioning and are working on diagnosing the vehicle listed above. The compressor clutch never cycles, though if A/C control pin at the PCM is grounded, it will. We have identified that ...
1999 GMC Yukon Denali 5.7L Hesitation, No Power on take off VIN: 1GKEK13R9X
This vehicle came in with symptoms of a plugged fuel filter, while taking off the power will fall off just like the fuel filter is plugged. We changed fuel filter and it was black inside and also was the factory filter. I suspected the fuel pump because pressu...
2006 Hummer H3 3.5L Misfire, MIL Lamp on VIN: 5GTDN13696
This vehicle came in with a check engine light on and a slightly rough idle. Had code 300 missfire and showed cyl.s 2 and 5 to be missing at idle but not under a load. Fuel pressure was 58 psi. Smoke checked the intake found no leaks.Ran injector drop test, al... Trouble codes: 300 (missfire)
2001 Pontiac Sunfire SE 2.2L No Start, no spark 1and 4 VIN: 1G2JB52491
Got a 2001 sunfire towed in... Found there is good fuel pressure, and checked for spark had spark but came to find out only on 2 and 3 swapped out coil for that one and still no spark at all. thinking towards module but would like some input first before I spe...
2002 Pontiac Grand Am SE 3.4L Turn Signal Relay VIN: 1G2NF52E72
Gentlemen, this Grand Am's turn signal relay is part of the emergency flasher switch. After using the turn signals, they cancel and the relay keeps clicking, sometimes 8 or 10 times. I have checked power and ground at the relay/switch, so I was wondering about...
2003 Pontiac Grand Am SE2 2.2L ignition VIN: 1G2NF52F23
Car came in with no start security light on. After programing the security system, the car started up. I installed new ignition lock tumbler with switch and the security light will not stop flashing and car will not start. I put old lock tumbler in car starts ...
2003 Saturn Vue 2.2L Gauges VIN: 5GZCZ23D73
Thanks in advance. We have this Vue with the Service Wrench Light on and the gauges are going crazy. None of my scanners will pick up a code. The truck runs fine and nothing is affected other than the gauges being erratic. Also when the wrench light comes on t...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet S10 LS 4.3L hard start VIN: 1GCDT19X7V
Had a 1 volt drop between battery voltage and ignition voltage. Found the battery wire from the positve post to the alternator was almost corroded in half. Fixed that wire and restored ignition voltage. Truck seems to be fixed. Thanks to those that responded.
2000 Chevrolet S10 2.2L Misfire VIN: 1GCEC1944Y
This pickup is FIXED! I replaced the PCM and had the dealer reflash it. Vehicle ran fine, no misfires and no hesitation. Thank you for the swift replies. Jerry sent me a TSB about testing for fuel injector restriction, good info and a common problem on this ve... Trouble codes: P0200 (Injector Control Circuit), P0303 (Misfire Cylinder 3).
2002 Chevrolet S10 LS 4.3L drive shaft VIN: 1GCDT13W92
Sorry for the long delay closing. The transmission cross member ended up being bent upwardws. you could not see this by looking at it. Thanks for all the help
1995 GMC Safari 4.3L Poor Idle Quality VIN: 1GDDM19W9S
I want to thank everyone who sent some advice, I tried all the sugestions without postive results. Finaly a last ditch effort I threw in another IAC, Yep that was it now the idle counts are around 38. Runs and idles as it should. Thanks again to those who took... Trouble codes: 35 (Idle control malfunction).
2003 GMC Sierra 2500 HD 6.0L steering VIN: 1GTHK29U63
The vehicle is fixed. The problem ended-up being the rear universal joint on the rear shaft. It was completely seized in one direction. Externaly it appeared fine with no discoloration or signs of grease loss. We replaced both joints on the shaft and the truck...
1995 Oldsmobile Aurora 4.0L Pressure Control VIN: 1G3GR62C7S
Replaced the computer yet again. Drove it for a week and put on [...] and so far problem has not returned.
1996 Pontiac Sunfire SE 2.2L thermostat VIN: 3G2JB1243T
Well gentleman your response was exactly the reason that I'm a member of this group.The first thing we did is drill a couple of 1/8" holes in thermostat because it's cheap to try.Radiator got hot at lower rad hose end but 2 holes are "too" big [as some of you ...
2002 Saturn L200 2.2L Radiator VIN: 1G8JU54F92
Thank you to just about every body that responded. Cascade did the trick. That is unbelievable, you can just see it break down the oil. Good learning experience. Thanks again.
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