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1995 Buick Park Avenue 3.8L Instrument cluster & HVAC
When I got the vehicle in I put my fault finder in the circuit and found nothing. Installed new fuse and road tested. Never did feel an engine miss. Everything is still working. This fuse controls the instrument cluster, door chime & info center according to t...		 View
1992 Chevrolet Pickup 6.5L Cuts out, Stall
after replacing turbo on truck, it will now die out after snapping the throttle. the truck will die even at highway speeds if clutch is pushed at high rpm. I checked over all tha turbo and everything looks good. I did find that the lifter pump was dead so I re...		 View
1995 Chevrolet Van 5.7L Failed HC's Too High
Customer Went For Test & Failed Only On HC's By A Little Bit.Actual Reading Was 2.2459 State Limit Is 2.0000.This Van Runs Beutifuly.I Checked O2's To Make Sure They Were Switching Ok & They Were.Checked Injector Pulse Width & Feul Trims All Were In Normal Ran...		 View
1998 Chevrolet Venture 3.4L No Start
this vehicle is not running. get nothing coming out of relay to fuel pump checked wires and no breaks, replaced junction box where relay is located. at wits end with this vehicle any help is appreciated. Trouble codes: PO230 (uel control circuit).		 View
1998 Chevrolet Pickup 4.3L No Start
The truck is hard to start after is sits awhile, more than six hours or so. It cranks real good, has spark, injector pulse and around 60 lbs of fuel pressure. It tries to fire right after you start to crank but then quits tring. If you keep tring to start the ...		 View
1998 Chevrolet Pickup 4.3L No Start, Stall
Hello This truck came to the shop on the hook. It would crank and stall. I checked for codes and it had a U1192 loss of communication and code P1626 pass lock data invalid. We pulled shrouds and covers and wiggled the wires on coloum from connector at bottom t... Trouble codes: P1626 (Pass lock data invalid).		 View
2001 Chevrolet Express 4.3L No Start
Hello GM Techs, I have a van that got towed in for crank no start. Found spark, fuel pressure from pump, but no injector pulse. Also tried to check codes and data with Snap-on Modis and no communication at all. Tried other scan tools and same thing. I checked ...		 View
2001 Chevrolet Cab & Chassis Silverado 6.0L Fuel pump operation
Vehicle has 2 fuel tanks. Rear tank will not drain down always stays full. Have no info on Shopkey on operation or diagnosing system. Have tested the basics. I can power up the rear pump from the realy so I know wiring is good from front to back. Any info woul...		 View
2001 Chevrolet Venture 3.4L No Start, Cuts out
hi everyone we replaced cam sencor , crank sencor , module fuel pumps working no cam sencor signal has rpm reading only starts when cold , then stalls Trouble codes: p0463 (fuel level sencor).		 View
1993 GMC Pickup 5.7L Cuts out, Stall
Runs fine when cold. After reaching operating temp, it will stall on decel or at idle. Will usually restart right away. In the shop it will idle for about 3 min and then just stall as if I turned the key off. Fuel press stays constant. If I unplug the IAC the ...		 View
1999 GMC Suburban 5.7L MIL Lamp on
Hello fellow techs,I have a suburban that is driving me nuts.I have a P0141 that keeps coming back.I have changed sensor twice with delco sensor. I have used a head light to check power and ground,both lit the headlight brightly.I followed the pipe from the ma... Trouble codes: P0141 (Bank 1 Sensor 2 Heater Circuit Fault).		 View
2003 GMC Sierra 5.3L folding mirror
power mirrors adjust fine but power folding function does not work on either side. does not have any codes or any other concerns. thanks for any input		 View
2003 GMC Sierra 5.3L MIL Lamp on
I have codes 461 and 463 fuel sender volts high the gas guage reads empty. I changed the fuel pump and sender assembly and for 10 mins the gas gague read full after turnning the truck off and restarting it the guage read empty. I let it sit for a while and the... Trouble codes: 461 (fuel level sender), 463 (fuel level sender volts high).		 View
1996 Oldsmobile Ciera 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on
car came in missing on cylinder two and dumping raw fuel out the exhaust. confirmed the injector had good pulse (which it did) and replaced the injector under the assumption it was stuck open. well afetr the new injector it is still dumping fuel in cylinder #2... Trouble codes: P0302 (cylinder 2 misfire).		 View
2003 Oldsmobile Alero 3.4L Odometer
We have a odometer that the lady says blinks every once in a while . It also has a code B1365 in the history code too. Has any one seen this? Thank -You for your help		 View
1995 Pontiac Grand Am 2.3L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy
This car has been a pain. When the car first came in the customer had already replaced the coils, module, and plugs. When I checked all four cylinders were running very rich. The car acts like it is missing it runs so rich. All four plugs were black. Checked t...		 View
2000 Pontiac Grand Prix 3.8L headrest
I am looking for some help. We have a 2000 Grand Prix GT 2 door that the drivers side seat belt guide got broken off. It mounts to the underside of the headrest with 2 screws.. The problem we are having is we can not remove the headrest to replace this piece! ...		 View
2001 Pontiac Grand Prix 3.8L ignition switch
key will stick from turning to off position intermittantly in wifes car. I removed the shifter knob but it still occurs. wait for a couple to a few seconds, sometimes more, and it will release and turn back to off position and come out fine.. any pontiac guys ...		 View
1997 Saturn SL 1.9L Ignition
This car was pushed from another shop. They had installed another engine, the car ran and test drove, mechanic pulled car back in to fix ground wire at the back of the engine, and apparently the ground hit the positive wire on the starter, sparked, and the car...		 View
2000 Saturn LS 2.2L No Start, MIL Lamp on
Car came in as a no start. We have fuel pressure, injector pulse, and spark. The spark appears to be a litle weak (won't reach end of coil boot on either coil). Plugs were wet, had low compression on 3 & 4, over 120 on 1 & 2. Oiled 3 & 4 and got over 100. Car ...		 View

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac Fleetwood 4.5L digital guages
one of the first things that I checked on the car was that the 16 volt wire going to the radio was not shorted to ground or that the radio was bad I pulled out radio which is after market and found that the wire was not connected to the after market steroe at ...		 2
1993 Cadillac Eldorado 4.6L Poor Idle Quality, Misfire, BACKFIRE
Thanks everybody for your help and advice. Many people here on the boards and other people I talked to felt that it could be fuel related, as in a leak in the fuel rail/injectors. I was very sure it was not, because I had a fuel gauge on it for almost an ent...		 14
1995 Chevrolet Monte Carlo 3.1L MIL Lamp on
Thanks for our help, guys. Most of you pointed toward carbon in the intake passage, some found broken wires ar poor connections. Mine was carbon in the passage. A badly frayed spedometer cable in the drill went into the passage and some good sized chunks di... Trouble codes: 77 (egr solenoid 3).		 19
2001 Chevrolet Silverado 4.8L MIL Lamp on
Replaced the intake manifold gaskets and both knock sensors.Knock sensors were full of water cleaned and replace them,intake gaskets were hard and flat,customer very happy now I thank all of you that helped me out with this wish yall the best of luck in this v... Trouble codes: PO171 (fuel lean bank 1), PO, 174 (fuel lean bank 2).		 24
2001 Chevrolet Silverado 8.1L all gears
Thanks for the replies, but they all covered items & areas we had already tested. As said in original post the only DTC that kept recurring was P1571. We ran the diagnostic procedures forward, backward & sideways with the same result "Replace TCM" but I just ...		 6
2002 Chevrolet Impala 3.4L anti-tehft
Thanks Dan [...] was stupid did'nt perform the relearn properly I was,nt going to crank positon every time.Thanks for your time its out of here.		 3
2002 Chevrolet Tahoe 5.3L Poor Idle Quality, Misfire
Thanks to all that replied. This vehicle has not return as of this date and the repair not made. About half of the response's I received suggested intake gaskets followed by leaking fuel regulater. This vehicle will return when the condition presents itself ... Trouble codes: P0300 (Multiple Cylinder Misfire).		 28
2003 Chevrolet Impala 3.8L rotors
Thank You All for your replies, most said never turn these rotors always replace, well we put 4 brand new Raybestos rotors ( the good ones) brand new Raybestos pads on front and rear.customer drove for 300 miles with no problem, we re- checked for run-out on r...		 31
2004 Chevrolet Silverado 4.3L Misfire
Thank you to everyone who took time to assist me. The problem was from a plugged catalytic converter as many people had suggested. I did not know that this truck with a V6 had two converters. I received many helpful and detailed suggestions that contained g... Trouble codes: p0300 (misfire), p0101 (MAF sensor performance).		 18
2004 Chevrolet Cavalier 2.2L rack&pinion
As many of you suggested I shut vech. off at speed the pull stopped, replaced rack&pinion and all is well! Once again iatn rocks! Thanks KEVIN		 18
2007 Chevrolet Silverado Classic 6.0L transfer cas
The general thought was a fluid issue. Not being full or wrong fluid. The trans shop thinks it is a magnet that is located under the pickup tube. The material that is being attracted to the magnet is another problem. I will check and change the fluid in thes...		 8
1997 GMC Pickup 6.5L No Start, Stall
First of all I would like to thank those who replied. Everything pointed to the PMD and as most of you know there is no test for this. I picked up a module from the local Stanadyne shop for 279.00 and made my own bracket. The bracket mounts on top of the upper...		 13
1997 Pontiac Bonneville 3.8L Blower
Hello Everyone. First I would like to thank everyone who responded to my call for help.Well it has been a couple of weeks and I have not had this vehicle come back. as I stated in my post That I had tried a control module and that was not the problem. In the w...		 15
2000 Pontiac Grand Prix 3.8L MIL Lamp on
Well, unfortunately the customer said they would return for futher diagnosis; and I waited as long as I could, but IATN want's a close. I did have lot's of usefull pertinent information from a few people: Bob [...] gave me great information regarding the hi ...		 12
1994 Saturn SL 1.9L Misfire, MIL Lamp on, #4 cyl in 4th gear
Thanks guys for all the replies. what it took to repair this vehicle was to decarbonize the engine three times. The reason it was so carboned up was not only the fact that it had 100,000 plus miles but also a defective thermostat that was stuck partially open ... Trouble codes: p0300 (Multiple cyl misfire), p0304 (misfire cyl 4).		 7
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