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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 20, 2005
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K8X
Hi everyone...Thanks for you help in advance!! This car came in orignally for a P0300 Code. The fuel filter was about 98% stopped up. We replaced the fuel filter and also did a throttle body cleaning..( This no longer seems to be a problem) While cleaning the... Trouble codes: P0401
1986 Chevrolet Cavalier CS 2.0L Hesitation, Cuts out, Misfire VIN: 1G1JD69P8G
Car originally came in on hook... Died on highway no previous symptoms. Would not start. ECT read -30 degrees, oil ridden with gas, replaced ECT, changed oil, replaced plugs, started fine, misfire #1. Replaced cap, rotor and wires (all OE). Misfire gone, runs,...
1999 Chevrolet Silverado 2500 6.0L A/C belt VIN: 1GCFC29U9X
This truck is a 1999 Silvarado C2500 with 6.0 engine.About a month ago the A/C quit working.There was no belt on it.Replaced belt and all was fine until today.Belt broke again. The belt looks like it just pulled apart.It isn't shredded or anything just pulled ...
2000 Chevrolet Blazer LS 4.3L trans VIN: 1GNDT13W3Y
When cold, you take off and it won't accel. Not slipping, acts like brake is on or in high gear. It will slowly start to move and then it would shift. scaner says that it is in 1st gear. Once veh. is warmed up it will shift normally. Fluid looks good and is no...
2002 Chevrolet Venture LT 3.4L No Start, MIL Lamp on
After putting on an intake gasket, vehicle was hard to start. After starting, ran great. Almost immediately though engine light came on. Got cam sensor code. Cleared code and drove for 5 miles. All was good. Restarted ok but then light came on again. Cleared c... Trouble codes: P0340
2003 Chevrolet Suburban 1500 LS 5.3L radio VIN: 3GNFK16Z93
Install gm navigation radio in place of the 6-disc cd radio it came with. Old radio worked fine (bosses truck) however he wanted to upgrade, problem I am having is that I can only get sound for a fraction of a second when channel is changed (you can barely her...
2004 Chevrolet Suburban 2500 LT 8.1L compressor VIN: 3GNGC26G64
When I first pulled this car in the vent temperature was about 90 degrees, compressor clutch disengage. Hook up my tech 2 could not communicate with hvac control module.Did research on Mitchell and Iatn could not find much help.Went back to the truck the next ...
2004 Chevrolet Silverado 2500 6.0L Poor Fuel Economy
First thing, thank you to all that respond. A customer of mine just purchased this 04 chev pickup at the time it had 5 miles on it. His question was why has the fuel milage dropped off. Orgionally it was getting around 17.5mpg. Now on the average he gets 13mpg...
1997 GMC K2500 Sierra SL 5.7L speedometer VIN: 1GTGK24R7V
after driving this truck for 30kms or so @ 90kph or more on the hwy, if you decel to 65kph the speedo drops to zero and stays there until your speed is greater than 65 and then it will resume working/ not working depending on your speed being over or under 65k...
2000 GMC Savana 2500 5.7L valvetrian VIN: 1GTGG29R3Y
hello, it's been awhile since i needed some input on a problem, hopefully you guys can help this engine has 2 bent exhaust valves on #3 and #6 i know all repair history on this vehicle for over a year and have no problems with the engine. our shop just sold...
2003 GMC Savana 3500 6.0L Misfire, MIL Lamp on VIN: 1GDJG31U53
random missfire code p0300 sets,intermittent missfire complaint, missfire history cly's #2,#4,#6,#8.all data good on freeze frame. #6 & #8 cly's have more history misses allready checked per iatn fixes, nothing found except ? #6 & #8 injectors. THANKS Trouble codes: P0300 (random missfire)
2004 GMC Savana 2500 4.8L Stall, MIL Lamp on VIN: 1GTGG29V24
Hello all, This one is a bit new for my country shop. Customer bought used and brought in witn check engine lite on.I pulled a code for the idle air control removed it for cleaning. It's a new style with sort of a boot over the spring on the pintle ;a type I'v...
1999 Oldsmobile Intrigue GL 3.8L theft loc radio VIN: 1G3WS52K2X
I had the battery disconnected while doing some work on the vehicle and forgot about the theft loc radio. Costumer did not have a code to unlock. I would appreciate it if someone could give me the unlock code for 842/857.
2000 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3N152T71
this car have a high rpm at idle 1200 rpm i check in the genesys and the desired rpm is 645 rpm, and the actual rpm 1200, the tps value is 3.53%, everything is ok the only problem are the rpm at idle to high. the iac value at idle is 50% i dont know why is to ...
2001 Other GM ISB 5.9L Surge, MIL Lamp on VIN: 4UZAAPBW81
when put from park to any gear,engine surges then idles normal after 3-5 seconds; looses power while driving intermmitantly. Trouble codes: 109 (eng. speed)
1995 Pontiac Sunfire SE 2.2L Poor Idle Quality, Stall VIN: 1G2JB5245S
This little Sunfire is frustrating. the car performs good for about 3 or 4 minutes at a time & then cuts out or dies. It always restarts easy. The timing advance PID fluctuates at idle sometimes as much as 10 degrees, but is very steady above idle. I adjusted ...
1995 Pontiac Bonneville SE 3.8L Cuts out VIN: 1G2HX52K8S
all components checked and voltage to pcm car will act like spark loss but never cuts off amp gauge willjump around when cutout starts only does it acouple times then may go a week perfect Trouble codes: P0321, P0341, P1630, P0117, P0112, P0123
1998 Pontiac Sunfire SE 2.2L Starting VIN: 12JB1247X7
Car came in with intermittent crank/no start condition. Checked basic ignition components and fuel pressure. All those and all wave patterns are within spec. Found 2 open GM recalls, one of which was for the ignition switch. Customer took car to dealer and had...
2000 Pontiac Grand Am SE 2.4L service vehicle soon VIN: 1G2NF52TXY
I cant seem to find the cause of the service vehicle soon light, I have checked for codes in ecm, abs system, airbag system, and instriment cluster, no codes or pending codes. but you can start the car and run it but as soon as it moves it turns the light on, ...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Century Custom 3.3L No Start, Misfire VIN: 1G4AH51NK4
what we ended up having was a mechanical problem . the rear cylinder head had a broken rocker arm and the part was discontinued from gm. we managed to get one from a salvage yard. the vehicle now ran good enough to work on.we also put on a different ignition m...
1994 Cadillac Eldorado Touring 4.6L 4th gear VIN: 1G6ET1296R
Thanks for all the good information! Most believed that cracked shift solenoids could be the problem. It was also suggested that I check the control wires near the transmission for oil. They have a problem with oil getting into the wiring, especially near the ...
1995 Cadillac DeVille 4.9L Poor Fuel Economy, MIL Lamp on, Transmission VIN: 1G6KD52BSU
Sorry Guys, This was a nail bitter... I found that the ECM was not grounding the TPS & CTS. Thanks for all your help and input. Trouble codes: 21 (Throttle Pos Sensor CKT High), 15 (Coolant Temp Sensor CKT High).
1983 Chevrolet K10 Suburban Silverado 6.2L No Start VIN: 1G8EK16CXD
thanx to some helpful memebers, i was able to obtain wiring diagrams to rewire the gas harness for diesel, the owner is very happy, thank you for all those who helped!
1984 Chevrolet G20 Beauville 5.0L Piston height VIN: 1GCEG25H6E
Evidently this van had a 307, not a 305. Several replys said the crank was a 307/327 by the casting numbers which has a 3.25 stroke instead of a 3.48 stroke which explains the piston being 1/8 inch from the top. One reply said I could make this a 327 by using ...
1996 Chevrolet C1500 Cheyenne 5.7L engine VIN: 1GCEC19R9T
Hello Tech's, I believe the problem has been solved with this one. The truck finally gave up long enough to do some testing, began with inspection of ignition system, found everything to be within specs there(coil was borderline on test, customer said replace ...
2003 Chevrolet Impala 3.4L overheats VIN: 2G1WF52E03
The problem was a bad BCM. We bought a new one from Chevy Dealer and of course had to take the car to their service department to have it programed.
1997 GMC Savana 3500 5.7L Shoes 13 x 3.5 VIN: 1GTHG35R6V
Hello again my fellow wizards! I appreciate all the replies and input that everybody sent! What an adventure (pain in the ass) this was but eventually corrected the problem. First, we tried bevelling the shoes at a 45 degree angle at all ends and thought it he...
1997 Pontiac Sunfire GT 2.4L No Start, Cuts out, Stall VIN: 1G2JD12TSV
hey guys thank you for all your replies I 1st did a relearn on the theft sys. that worked for 2 days. All the wires to the ignition switch looked to be in good shape so I changed the igniton switch and it been good for the least few days thank you all again fo...
2001 Pontiac Montana 3.4L 4th gear VIN: 1GMDX03E71
Sorry for the delay thanks for all the posts, completly oerlooked 4 th gear splines - looked at them about 10 times -looked fine -like they were fine until we realized the splines were supposed to go all the way to the end of the shaft not cut off about half w...
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