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1997 Buick LeSabre 3.8L No Start
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 ...		 View
1989 Chevrolet Corvette 5.7L No Start, Hard Start
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...		 View
1997 Chevrolet Suburban 6.5L Charging
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...		 View
2003 Chevrolet S10 Pickup 4.3L ABS module
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...		 View
2004 Chevrolet Tahoe 5.3L MIL Lamp on
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).		 View
2004 Chevrolet Tahoe 5.3L signals
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...		 View
1993 GMC Jimmy 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on
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).		 View
1997 GMC Sonoma 4.3L Excessive Emissions
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 ...		 View
2001 GMC Savana 5.7L Poor Idle Quality, Misfire
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 ...		 View
2003 GMC Envoy 4.2L MIL Lamp on
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 (coolant thermostat), U1000 (No state of health from module).		 View
1989 Oldsmobile Cutlass Ciera 2.8L Hesitation, Stall
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...		 View
2001 Oldsmobile Silhouette 3.4L Cuts out, Stall
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 (tps ckt intermittant low voltage), p1189 (engine oil pressure switch ckt), p1626 (theft detterent fuel enable signal lost).		 View
1996 Pontiac Bonneville 3.8L No Start, Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy
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...		 View
1997 Pontiac Grand Prix 3.8L No Start
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: PO336 (crank position performance).		 View
2001 Pontiac Grand Prix 3.8L fuel gauge
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...		 View
2002 Pontiac Grand Am 2.2L slave cylinder
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...		 View

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal 3.8L blower motor
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...		 7
1998 Cadillac DeVille 4.6L steering
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...		 3
2000 Cadillac DeVille 4.6L power steering
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...		 6
2001 Chevrolet Suburban 5.3L Red warning lamp on
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. ...		 4
1998 GMC Suburban 5.7L MIL Lamp on
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 (cam to crank sensor position correalation fault).		 11
1997 Oldsmobile Aurora 4.0L radio
FOUND SHARTED WIRES IN DRIVERS DOOR JAM. VOLTAGE FEEDING BACK THROUGH THE ELECTRIC WINDOW CIRCIUT		 3
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