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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 1, 2006
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Eldorado 4.6L Shifting/Dash VIN: 1G6EL12Y3R
Hi group! Have a weird one here, this vehicle orginally came in for erratic idle. Diagnosis showed bad computer. Replaced ecm with reman from dealer. Performed idle/tps relearn procedure and everything perfect. Now 1 week later, vehicle slams into gear from pa...
1997 Cadillac Catera 3.0L Mechanical VIN: W06VR52R5V
I'm servicing the Timing Belt on this Car with a 3.0 engine DOHC. There are 3 Belt Tensioners, I just wanted to ask how can I tell if the belt is to tight? One of the directions suggested using a ruler and the belt should have any more play than 1cm. Of course...
1995 Chevrolet K2500 6.5L Stall VIN: 1GCGK29F9S
The best description for the symptoms (I haven't gotten the truck yet) is a vapor lock type problem. Runs fine down the highway, starts great, never dies, etc. Kill it when hot, go in and eat or wait approx 30 minutes, then start it and it will run for approx ...
1996 Chevrolet Monte Carlo Z34 3.4L Stall VIN: 2G1WX12X7T
car cuts off at temperture when on decel or stopped like switch is cut off restarts fine when it starts continues to cut off util you let cool off does fine untill it gets back up to temp.
1996 Chevrolet C3500 Cheyenne 7.4L MIL Lamp on VIN: 1GBKC34JXT
This truck was towed to the shop. It had been sitting since the tabs expired in December. Amoung the problems wew encountered getting this thing to start were a missing battery and starter. Also the customer had lost the ignition key. After clewaring those hur... Trouble codes: 1351 (System voltage low Timing circut)
1999 Chevrolet C2500 Suburban 7.4L poor power VIN: 3GNGC26J1X
Not a huge concern here but am wondering if anyone knows what kind of power this unit should have. here is the situation. this is a 2wd heavy gvw suburban that pulls a large utility trailer (full of stage equipment). we have a hill in town here that is approx....
2001 Chevrolet Tahoe 5.3L excesive cank VIN: 1GNEK13T11
have this 01 tahoe that has an excisive crank when cold, ck for dtc, non found. Performed fuel pressure test at schreider vave on engine, found 60 psi when runing, turned car off and cked preesure stil 60, after 55 mins pressure fell to 10 psi. is it possible ...
2001 Chevrolet Blazer LS 4.3L engine noise VIN: 1GNDT13W31
Hello to All! We have an unusual one here and we need some help with this one. The vehicle cam to us with a complaint of a "ticking" type noise once warmed up, seems to be o.k. cold. We verified customer complaint and used a stethoscope to listen for the noise...
2002 Chevrolet Express 3500 5.7L rear axle seals VIN: 1GCHG35R42
we checked to make sure vent is not plugged GM says it is because the van is overloaded but we do not agree with this. Any help ?
2003 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC12F93
this car wont start. it tries a little. it seems to have fire and injector pulse when we let off the key intermittantly, also while bumping the starter. it does not seem to be a vtd problem. we have tried multiple ecotech pcms. multiple ign. modules. all power...
1991 GMC Safari SLE 4.3L Stall VIN: 1GKDM19Z8M
First time post so please be patient. Vehicle died a couple of weeks ago , found no spark and replaced ignition module. It fired right up with the new module, I figured it was fixed. Since then it has been stalling when it's hot and in gear. I replaced the mod...
1999 GMC C6500 7.4L hard start VIN: 1GDJ7H1D7X
This vehicle came in for hard start after hot soak and also when cold. Checked for codes no code in history or current. checked fuel pressure ok, spark ok, hooked up scanner all pids look good while cranking. What this thing does is it will crank over and just...
1995 Oldsmobile Aurora 4.0L MIL Lamp on VIN: 1G3GR62C8S
Hello Everyone, This car was brought to me with a no start (with key), and a poor idle quality complaint. I ran down the "no start" as a bad relay (the one controlled by the VATS computer). At that time it was noted that there was no communication between the... Trouble codes: P0080
2000 Oldsmobile Alero GL 2.4L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1G3NL52TXY
Ok guys, heres a good one. At adle all times with this one it misses all the time. I have checked fuel pressure at spec 52 psi, compression is 175 even all cyls, fuel filter replaced, coil tower have tracking in it and has been replaced. Backpressure checked a... Trouble codes: P0300
1978 Pontiac Firebird Trans Am 6.6L evap. and heater core VIN: 2W87Z8N111
Well the time has come for a new evaporator and a new heater core. Cannot find my service manual. Does anyone have the procedure for removing the heater box and also for the evaporator? I mainly want to know if I need to pull the dash out some or not, and if t...
1995 Pontiac Grand Prix SE 3.1L guage VIN: 1G2WJ52MXS
this grand prix came in with overheating complaint. coustomer stated that it was not losing coolant just running hot. we pluged in the scanner cooling fan is coming on at 230 then back off at 210. we checked the tempature with a heat gun at the thermostat hous...
1997 Pontiac Trans Sport 3.4L Surge VIN: 1GMDX06E0V
Sorry about the long post! I've got a wierd one here, I hope someone can give me some direction. I installed a used engine in this van last week, it ran great. Late Friday it was towed in because it would idle but wouldn't move (customer had put 125 miles on i... Trouble codes: P0706
2002 Pontiac Grand Prix SE 3.1L suspension VIN: 1G2WK52J92
Hi guys! We have a 2002 grand prix with a clicking noise coming from the passenger side tire. we replaced both wheel bearings, and both upper strut mounts, passenger strut, passenger drive axle, torqued control arm, lubed ball joints, lubed tie rods. Noise is ...
2003 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL62863
This car has three trouble codes stored. 440, 441 & 446. The flow charts say to first go to the code that has freeze frame records. That is code 441 only. Using the Tech 2 I ran through the flow chart. It says that the fuel tank pressure sensor should read zer... Trouble codes: 441 (EVAP system no flow during purge)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet Lumina LS 3.1L Excessive Emissions, Hesitation, Poor Fuel Economy VIN: 2G1WN52M8S
Coil pack did the trick. #1/4 coil pack. Installed this morning and car runs like a new one. Found out from customer that tune/up wires were just done by shadetree/ neighborhood mechanic and states car ran worse after they were done. hmmmm.. Lessons learned, ...
1997 Chevrolet Blazer 4.3L 1-2 shift 4th gear VIN: 1GNDT13W3V
after sending it to a trans shop, it comming back doing the SAME exact thing... replaced internal harness... and plug in, problem solved!
2000 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNEC16T2Y
Thanks everyone for your replies. I adviced the customer to disconnected the battery for couple of hours and reconnect it because it seemed like the computer was confused. He did as I said and both of the codes disappeared and never came back on. Trouble codes: P1415 (Secondary Air Injection System Bank 1), P1518 (Throttle Actuator Control Module).
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
Customer took car to try a different shop, thanks to everyone that replied, some thoughts on the problem were ignition switch, or grounds and power sources. the tps had over 7 volts while the car was running it should have been 5, so my thought was the pcm sin... Trouble codes: P1189 (engine oil pressure switch circuit), P1635 (5 volt reference 1 circuit).
2001 Chevrolet Blazer LS 4.3L tailgate wont release VIN: 1GNCS13W71
Thanks to all for the valuable info. All the panel screws (3) are not accesible with the tailgate and glass shut. I had to devise a way to pry the upper panel away from the tail gate. If you use 2 brake adjusting tools and pry away the upper cover, you can tri...
1996 GMC Yukon SL 5.7L No Start VIN: 1GKEK13ROT
First of all I want to thank iATN for this service and also thanks to all the Techs that responded to my help I did hook up the pump direct and got the pressure to go up another 5 lbs. and it started so I replaced the fuel pump with an AC Delco and it starts a...
1996 Saturn SC2 1.9L No Start, Poor Idle Quality VIN: 1G82K5272T
We bring this car to an injection specialist shop then 3 hrs later the car was running fine , the shop owner tell me that the only thing they do is thingthening many connector .Thanks to all of you Trouble codes: P0340.
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