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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 5, 2006
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L MIL Lamp on VIN: 3G5DA03E22
This vehicle came in with no running problems. It also has Codes U1000 and B1000. Only problem is that SERVICE VEHICLE SOON light is on and the remote won't lock or unlock the doors. Light came on and remote quit working at the same time. Vehicle has a couple ... Trouble codes: P0101 (MAF out of range), P0171 (Lean Code), B2961 (Key in Ign Ckt Failure), P1635 (Unknown), P1811 (Unknown), U1064 (Unknown)
1997 Cadillac Seville STS 4.6L no oil pressure VIN: 1G6KY5297V
Vehicle was towed in after the long New Years weekend with the alternator laying on the engine cradle with a note in our after hours drop box requesting installation of a customer supplied alternator. Obviously the customer had attemted and failed to replace t...
2004 Cadillac Escalade 6.0L Parking Assist VIN: 1GYEK63N14
I have very limited about of info. I have never worked on this before. The truck had been to the body shop for some small bumper repairs. Now the parking assist system doesn't work. I don't really know were to go from here. I have checked powers to the rear od...
1993 Chevrolet C2500 Cheyenne 5.7L line pressure VIN: 1GCGC24K9N
Hello and let me say what a great site this is.I am fairly new to iATN and have never posted before. We have a 93 Chev c2500 5.7 gas 4L80E trans which had no reverse, took it apart and found reverse clutch piston broken. We put it back together with the new pi...
1993 Chevrolet K1500 Suburban 5.7L Excessive Emissions, High fuel pressure VIN: 1GNFK16K69
This truck came in as an emissions test failure with excessive hydrocarbons at decel. A road test determined that there was no obvious misfire and I backed this up with a secondary ignition scope check. Four-gas analysis found good readings at idle and 2500 RP...
1997 Chevrolet K2500 Suburban LS 7.4L Surge, MIL Lamp on VIN: 3GNGK26J2V
This is a well maintained truck that has a very bad surge when hot. It is intermittant, but can usually be duplicated after a hot soak of fifteen minutes . The truck starts easily and idles good, but when you try to accelerate from a stop the truck lurches on ... Trouble codes: P0102 (Mass air sensor signal low)
1998 Chevrolet Tracker 1.6L Check Engine Light VIN: 2CNBE136XW
I sure could use some help with this one. My customer came in with a check engine light on. We did a scan and got code P0400. The tech narrowed it down to the EGR vacuum switch. We replaced it and everything seemed fine. The customer came back in and said the ... Trouble codes: P0400 (EGR Code)
2003 Chevrolet C4500 Kodiak C4C042 6.6L No Start VIN: 1GBC4E1123
hey all. this big truck wont start. i replaced the fuel filter (filled with fuel), it ran for a minute or 2, then died. will not start. i figured it sucked up air. so i went to the tank to pressure the fuel pump up, ( it has wires for a fuel pump,) and the pum...
2002 Chevrolet Silverado 2500 HD 6.6L anti theft VIN: 1GCHC23102
will not start but will crank found these codes im not real familier with anti theft systems any help will be really apprieciated
1998 GMC K1500 Sierra SL 5.7L abs VIN: 2GTEK19R9W
we have a brake pedal problem. we can push the the brake peddle and at the last second that the vehicle is stopping the abs kicks in. scanner had code of right front wheel sensor open circuit. we replaced didn't cure the problem.checked condinuity of all wires...
1995 Oldsmobile Cutlass Ciera 3.1L filling gas tank VIN: 1G3AJ55MXS
When you try and fill this car with gas it will actually shoot gas out of filler neck while you are trying to refuel it.
1998 Oldsmobile Intrigue 3.8L Starter VIN: 1G3WH52K0W
This thing has been driving me nuts for months. Intermitantly, by this I mean once every month. Starter will not engage, the computer is not engaging the starter relay. Another symtom which also appears at random is the security lamp will come on while driving...
1995 Saturn SL2 1.9L power loss VIN: 1G8ZH1275S
hey guys cust.said for 2 days in a row the car would lose power and feel like it wants to stall only in the am after the first 2 or 3 miles.found info flag 52 for esc at full retard limit.had her leave it overnight and i cannot duplicate the problem.i can get ... Trouble codes: 53 (info flagesc at retard limit), 52 (battery voltage out of range)
1998 Saturn SL 1.9L turn signals VIN: 6589473232
Turn signals not working. Hazzard lights, indicators not working, and neither the power windows. What can the problem be?
1999 Saturn SC1 1.9L Unknown VIN: 1G8ZF1285X
When the vehicle is put into drive the low coolant and engine temperature light flashes. The vehicle does not overheat. We replaced the low coolant sensor. There is 12V to the low coolant sensor. Replacing the sensor did not change anything.

Fixes & Summaries for GM
Fix/Summary Answers
1988 Chevrolet K2500 Cheyenne 5.7L No Start, Hesitation, Surge, Cuts out VIN: 1GCFK24KBJ
i am sorry to say that i did not fix this truck. i replaced the trottle body gasket. then i checked the ground at the thermostat. i followed the wire into the harness a good couple feet back and did not find any problems. i went ahead and rerouted the ground t...
1994 Chevrolet Beretta 2.2L Excessive Emissions, Hesitation, Surge VIN: 1G1LV1545R
Thanks to all for the quick replys. The resounding theme was the egr valve. Steve and Kenneth explained how this thing works with the backpressure. Others said the spring weakens which can cause it to overreact. I had suggestions for exhaust backpressure,(whic...
1997 Chevrolet S10 2.2L No Start VIN: 1GCCS1440V
the timing chain ten had come a part on one side and made it out off time by five teeth . i, like to thank all of you who responed. it is good to know that some can still work as a team .
2000 Chevrolet Silverado 1500 5.3L ABS Circuit VIN: 2GCEK19T6Y
Thanks to everyone who replied with input, especially John who emailed me the wiring schematic and Steve who provided recall info. I cleaned up the grounds like everyone mentioned, fixed a badly bruised wire at the connector, and did a brake fluid flush...dirt...
2002 Chevrolet Express 1500 5.7L Misfire, MIL Lamp on VIN: 1GBFG15R72
to all techs that responded i did all checks that everyone sent to no prevail, this one totally stumped this shop. i was forced (which i have never done before) to have customer take this one to chevy for repairs. the dealer had van for over two weeks and then... Trouble codes: P0300.
2004 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHC23254
the truck went to the dealer and i will post a comment when i hear something...
2002 GMC Sierra 1500 Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTFK69U32
why is it when 'john q public' drops off his car and you have to pry symptoms out of him like it is his pin #, it's still easier to diagnose his vehicle than it is to diag your own... i felt like an novice ...i should have just watched the fuel trim #s and saw... Trouble codes: P0300 (random misfire).
2001 Oldsmobile Alero GL 3.4L converter VIN: 1G3NL52EX1
Had several good responses. Had my customer try the battery disconnect overnite first. Doesnt cost anything. She said she would get back with me if it didnt improve. Havnt heard from her since. Could be good news. Thanks everybody.
1991 Pontiac Grand Prix LE 2.3L No Start, Stall, Starts and dies VIN: 1G2WH54D2M
Thanks for all the replies... Customer had said he checked the fuel pump and pressure... I took that for granted. Here is what it was... the fuel pressure regulator. When the vehicle had full juice (from the alternator, or my battery charger), it had 130 PSI i...
1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE12T8T
Thanks for all your help, we did not fix this vehicle as the customer chose not to pursue it any further however we did determine that it was an internal engine problem as some of you suggested, we tried rolling the engine over by hand and it would turn freely...
1999 Pontiac Grand Am SE 2.4L abs VIN: 1G2NE52T8X
Thanks for the fast replies,Chet from NC. nailed the location of the EBCM as the in LF inner fender, Alldata and AC Delco had it under dash. Upon removing the inner fender panal I found acid from a previously leaking battrey dripped on the harness and eaten ...
2000 Pontiac Grand Am SE 2.4L passlock VIN: 1G2NF52T1Y
Thanks to all who resonded. Fix was to replace the lock cylinder only. Called my GM parts dept and had them to key the new cylinder to the VIN so it would be the same. Hasnt failed since. Great help and confidence builder. Thanks again!
2001 Saturn L300 3.0L High speed blower VIN: 1G8JW52R41
Hello everyone, this vehicle had to leave and has not returned. I didn't have a chance to perform futher diagnostics as the owner did not want me to spend anymore time on it. Thanks again everyone.
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