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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 28, 2008
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52KOV
This lovely car was towed to us for a no start problem. Check saw that fuel pressure was only 20lbs thought easy fix new pump away they go...but nope..so after new pump fuel pressure was back with inspecs.. I have good spark, injector pulse, fuel pressure and ...
1989 Chevrolet Corvette 5.7L No Start, Hard Start VIN: 1G1YY3189K
Hey Group,Thanks for taking a look at my post.The problem I'm having the scan reading on my Solus Pro,for the coolant temperature sensor jumps around climbs into the hundreds when its should read 66 degrees F to match the MAT.I Ohm tested the wires from the se...
1997 Chevrolet C2500 Suburban LS 6.5L Charging VIN: 1GNGC26F3V
Hey All,Help !!! since 01\08 we've replaced alt. 3 times this is the 4th time back.Thought it was just cheep remans.We used a local rebuilder in our area.Last month we used a delco reman. and the truck is back for another go around.Anybody have any idea??Thank...
2003 Chevrolet S10 4.3L ABS module VIN: 1GCCS19X43
Vehicle came in with ABS and brake warning lights blinking on and off. Checked codes and found a c0265 EBCM relay ckt. problem. Ran down diagnostic tree and determined that the EBCM needed to be replaced. Replaced EBCM and now there is no code c0265, however t...
2004 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z54
This vehicle came about a month ago with MIL on & wouldn't go over 15 mph. Found PCM was in "reduced power mode" & codes P0120, P0220, & P1516. Checked scan data, all looked good so we cleared codes & couldn't get them to come back. Truck came back in 3 days ... Trouble codes: P0120 (tps sensor 1 circuit), P0220 (tps sensor 2 circuit), P1516 (TAC module throttle actuator performance)
2004 Chevrolet Tahoe LS 5.3L signals VIN: 1GNEK13Z74
Hi guys, got this 04 tahoe in with a signal problem. when signaling left, often but intermittently the r/h signals also flash as if the 4 ways are on. This never happens when signaling right. I replaced the multi-function switch, thinking this is the most comm...
1993 GMC Jimmy SLE 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GKDT13W8P
Runs very rich at idle and cruise o2 above .8v will set code on highway but not in town monitored with graphing meter, plugs and o2 very black. Holds fuel pressure. Removed plenum no leak found looked at each poppet valve all have same spray pattern.Does the f... Trouble codes: 45 (rich exhaust)
1997 GMC Sonoma SLE 4.3L Excessive Emissions VIN: 1GTCS19X3V
Hello I have a 97 sonoma 4.3 with a high emission problem. We dont usually work on domestics (mechanics truck) so thats why i turned to the iatn for some help. Under idle and accleration the o2 sensor is reading rich. No matter if you snap the throttle and on ...
2001 GMC Savana 3500 5.7L Poor Idle Quality, Misfire VIN: 1GDHG31R51
Vehicle came in with the complaint that runs bad cold and when warmed up it seems to run fine. Number 1,2 4,6 cylinders are misfiring, do not change with shorting them. Checked fuel pressure, codes none found, check misfire counters and there were none, moved ...
2003 GMC Envoy SLT 4.2L MIL Lamp on VIN: 1GKDT13SX3
Hey Guys, I have this 2003 Envoy with a U1000 code that keeps resetting under both PCM & IPC. Vehicle came in and customer stated that MIL light was on but went off on the way over to us. For the P0128 code I'm going to replace the thermostat. The U1000 code i... Trouble codes: P0128, U1000 (No state of health from module)
1989 Oldsmobile Cutlass Ciera 2.8L Hesitation, Stall VIN: 2G3AJ51W6K
This car came in a few weeks ago for a surge / dying problem and an inop coolant fan. At that time we replaced the injector orings and repaired several other vaccum leaks under the plenum and around the engine compt along with a coolant fan relay, fusible link...
2001 Oldsmobile Silhouette Premiere 3.4L Cuts out, Stall VIN: 1GHDX13E61
Vehicle stalls intermittantly, usually at idle, cold or hot. Also cuts out at idle or driving above 3100 rpm. Performed vacuum test while cutting out and found exhaust restricted at Cat. and rear O2 matching front signal. Replaced cat and rear O2. No change. C... Trouble codes: P1122, P1189, P1626
1996 Pontiac Bonneville SE 3.8L No Start, Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy VIN: 1G2HZ52K4T
I have never seen this one befor. car came in for no power and stalling problem , i checked fuel pressure and it was at 10psi so i replaced pump and car was back to good . next day customer comes to pick car up and goes to leave and puts power windows down and...
1997 Pontiac Grand Prix SE 3.8L No Start VIN: 1G2WJ52KOV
I replaced the IGNITION MODULE twice!!! Vehicle towed in crank no start no spark. Has fuel pressure and injector pulse. I have power, ground, 3x and 18x crank signals to the ICM. I also have cam signal going in and coming out of ICM. I do not have 3x signal co... Trouble codes: P0336
2001 Pontiac Grand Prix SE 3.8L fuel gauge VIN: 1G2WP52191
this grand prix is a nightmare fuel gauge starts out full when car is started. in park or neutral gauge will fall to empty fast. in drive or reverse gauge falls slowly. no matter what the gas level is. cust already had gm cleaner put into tank no difference. a...
2002 Pontiac Grand Am SE 2.2L slave cylinder VIN: 1G2NE12F72
Replaced the master slave with OE parts. It comes in one assembly. I replaced it for leaking at the slave cly. and car came back two months latter, dealer warenteed the part and now it's back again one month for the slave leaking again. What is wrong with Me o...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal LS 3.8L blower motor VIN: 2G4WB52K8Y
Thank you all for your help!!! This is truly a site for professionals!!! The fix turned out to be the ignition switch which most of you suggested. We apologize for not giving a detailed test procedure that we had performed but were backed up with nothing bu...
1998 Cadillac DeVille 4.6L steering VIN: 1G6KD54Y3W
thamk you for the responses...pretty good sugestions...we analize trougholy the system veeeery carefully...and we ordered the EBTCM due to internal short.besides the EBTCM defective we found the steering posicion sensor defective too. In spite that we were r...
2000 Cadillac DeVille 4.6L power steering VIN: 1G6KD54Y8Y
Sorry for not closing sooner. As I stated before being that it happens rarely. We drove for over 100 miles & did not expierence this complaint. This is one of those cars where we & cust do not want to throw parts at it. cust is going to drive & keep us informe...
2001 Chevrolet Suburban 1500 5.3L Red warning lamp on VIN: 3GNEC16T31
Thanks to the ones that replied. Replacing the master cylinder resivoir,which had a new sensor as well already in it was the cure for the lamp staying on. Aparantly the float,with a magnet built into it, I presume,within the resiovoir was stuck to the bottom. ...
1998 GMC K1500 Suburban 5.7L MIL Lamp on VIN: 1GKFK16R9W
thanks to all who replied. the scanner showed almost 20 degrees retard of cmp sensor. rotor seemed to have alot of slop when turning by hand. removed the distributor and found the drive gear just about worthless! dropped a new distributor in and set it to 0 ... Trouble codes: P1345.
1997 Oldsmobile Aurora 4.0L radio VIN: 1G3GR62C9V
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