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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 9, 2006
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Seville STS 4.6L Rear air suspension VIN: 1G6KY5495X
This STS has auto-levelling suspension (rear). The front struts have an electrical connector, but the rears have only an air hose fitting. Going by the listed vin#, the Cadillac dealer says the rear shocks go for almost 800 clams each. Aftermarket air shocks a...
1993 Chevrolet S10 Blazer 4.3L controler VIN: 1CNDT13WXP
Ok this is a tricky one! this truck was brought to us from a different shop in town. The 4x4 was inop. No lights on the switch worked! and no t-case shifting at all. One more thing the other shop just replaced the module and t-case shift motor one day before I...
1993 Chevrolet C1500 Cheyenne 4.3L MIL Lamp on VIN: 1GCDC14Z3P
Hello, This truck came back for the complaint of check engine light on.Scanned vehicle w/soluus,code 43 present.Drove w/ scanner installed after clearing code,after appxly 2 miles under moderate accel. Code reset.Checked reference volt. at esc module had 8.9 v... Trouble codes: 43 (esc module or sensor problem)
1994 Chevrolet S10 Blazer Tahoe 4.3L abs VIN: 1GNDT13W6R
Hello I got a good one. This a $1000 special my regular customer purchased from his brother inlaw with an existing problem. The right rear wheel will lockup under moderate foot pressure and brakes feel grabby. checked brakes and right rear severly worn left si...
1996 Chevrolet C1500 Cheyenne 5.0L Excessive RPMs VIN: 2GCEC19M6T
There are about 2500- 2700 Rpms when clutch pedal is released in any gear when driving over 7 MPH. If IAC or VSS is disconnected, the symptom disappears. PID readings are all normal on my MODIS scanner. No vacuum leaks are present. The shop that had it replace...
1998 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCEC14WOW
This truck came to us with a crank, no start. If you crank the engine, it will start and immediately die. The security light flashes 3 times and goes out. If you crank the engine again, it does the same thing. The sensor data list shows VTD fuel yes until the ...
1999 Chevrolet Lumina 3.1L Cuts out, no WOT VIN: 2G1WL52M9X
customer brought vehicle to us and said had no acceleration on highway. test drove vehicle and found that it wouldn't accelerate under 3/4 or full throttle. it does this under a load or in garage stall. oxygen sensor 1 upstream from cat shows lean condition wh...
2000 Chevrolet Impala LS 3.8L Dash, radio lights VIN: 2G1WH55K8Y
Hello Techs. I have recieved this Impala recently and am trying to get a head start on it. The dash lights and radio lights are supposed to fade down when the lights automatically turn on. They do fade down but way too far. They actually turn almost off. You c...
2001 Chevrolet Monte Carlo LS 3.4L Poor Idle Quality, Surge, high idle VIN: 2G1WW12E01
This car came in idiling at 3500 rpm. if you shut it off for a minute and restart it, it will idlr normally for about a minute then race back to 3500 again. I checked for vacuum leaks and found none, checked codes and only got a code for high idle. I used an I...
2001 Chevrolet Silverado 1500 4.8L Hesitation, Misfire, MIL Lamp on VIN: 2GCEC19V61
this vehcle came in for missfires under load, has lots of miles, inside the throttle body i could see lots of build up so i performed a bg induction clean, also a fuel injection service , vehicle seems to have huge spark knock at cruise, fuel pressure seems to... Trouble codes: P0300 (multiple missfire)
2001 Chevrolet Impala 3.4L Accessories VIN: 2G1WF55E31
i posting this for one of my employee's.. the battery light came on, but its charging 14v, door ajar warining indicator is on at all times, when you open a door the dome light will flash on and off, cooling fans not working, a/c wont come on, radio locked itse...
2001 Chevrolet Express 1500 4.3L MIL Lamp on VIN: 1GCFG25W32
Hello,this chevy van keeps setting a code p0335 crank sensor signal loss.Scope sensor and found the pattern to split when engine rpm is brought up to about 2800 rpm.Remove sensor and check reluctor wheel and found it to be tight with out movement.Relaced senso... Trouble codes: P0335 (Crankshaft sensor signal is not detected for more than 3 secs.)
1992 GMC Jimmy SLE 4.3L Alternator VIN: 1GKDT13Z4N
Hi guys, This Jimmy has had chronic alternator problems since the customer bought it five years ago. He complains that he has had to replace the alternator at least once or twice per year. Within the last three weeks, however, it has gone through 4 alternators...
1997 GMC C7500 6.0L Poor Idle Quality, Misfire VIN: 1GDL7H1P6V
Vehicle came in with an initial complaint of "Runs rough, unable to exceed 45 mph while hot." Unsuccessful in duplicating the 45 mph portion of the complaint, on the road test the vehicle always ran ok, but the idle is extremely rough at stops, and in shop. Pr... Trouble codes: 13 (Oxygen sensor open short or bad), 44 (Lean Exhaust), 45 (Rich Exhaust)
1997 GMC Jimmy SL 4.3L #4 gauge fuse VIN: 1GKDT13W8V
Truck broke down out of town, another repair facility could not find the problem. replaced alternator. Removed complete dash board and short still happens. Apperently was dead short to ground when the other shop had it and short went away so they thought they ...
2000 GMC Yukon XL 1500 SLE 5.3L heater VIN: 3GKFK16T4Y
Truck came in with concern of no heat.Front or rear. Coolant was a little cloudy so we replaced T-stat and flushed coolant with no improvement. Engine temp runs normal at all times. Driving or at idle. Flushed the heater cores seperately and seemed to have goo...
1999 Pontiac Grand Am SE 3.4L overheating VIN: 1G2NE52E1X
this one has me stumped, vehicle came in 2 weeks ago with a overheating concern after pressure testing system found no leaks present. suspected a sticking t-stat. after replacing t-stat and bleeding system vehicle would run for hours with great heat and at 200...
2001 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NW12E91
car towed in no start. have good fuel pressure, have spark and we have rpm signal with scanner. injectors not accessable so used a stethascope to listen for clicking. had none so in stalled a cam sensor and still no start but now do have injector clicking. HEL...
2001 Pontiac Sunfire SE 2.2L fuel gauge inop VIN: 1G2JB12441
gas gauge on empty, check gauges light on. this is what is supposed to happen in default mode. customer has already replaced cluster with salvage one. scan data shows fuel level at 70%. looks like bcm in between pcm and cluster. is bcm most likely cause since ... Trouble codes: P0463 (fuel level sesor high / open)
2000 Saturn LS2 3.0L Service(Wrench)Light VIN: 1G8JW52R2Y
This vehicle has been in twice now with the same complaint. She says that intermittently the Service (Wrench) not Service Engine Soon Light comes on and the vehicle hesitates/lurches/shifts hard (we're having trouble getting a real clear description). The only... Trouble codes: P0000 (Lost Communication or Undefined Code)
2001 Saturn L300 3.0L 1-2 shift VIN: 1G8JW52R91
Hey guys' Hope someone can give us some help on this one. The code we get is P1811 max adapt & long shift, when driving after the vehicle warms up it will shift hard especially coming out of 1st and 2nd. If you turn the car off it will drive normal upon restar...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Skylark Custom 3.1L gauges VIN: 1G4NJ52M0T
after checking grounds again and all connections we concluded that the cluster was bad, internal loose connection. replacement cluster fixed problem. thanks for all the help.
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G3WS52J01
Hello all thanks too all who responed. Well once agine the support from members of iatn is hands down the best.Alot of replies from low tech. to hi tech.But the one that fixed the car was Thomas [...]. With the relearn procedure for the learned minimum value for t... Trouble codes: P1404.
1995 Chevrolet S10 LS 4.3L Hesitation, Surge VIN: 1GCDT19Z5S
Thank you to every one that replied. I found the timing to be retarded with slack in the chain and the dist drive. I advanced the timing which helped. The customer needed his truck back for work and is going to bring it back in a couple of weeks when he goes o...
1997 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, MIL Lamp on VIN: 2GCEK19RZV
The fix was another distributor, we actually tried one more crown because our supplier was willing to just zero trade. Installed 2nd distributor and everything stayed as it was supposed to thaks for all the replies. Trouble codes: 1345A (ckp/cmt out of sync.).
1998 Chevrolet K3500 Cheyenne 7.4L MIL Lamp on VIN: 1GCHK39JXW
OK men thank you all. Joe,Alex,Kerry,Carl [...] am having FastChip reprogram the black box (computer). We were going to install a larger MAF (customer is thinking of selling and getting turbo diesel late model) but decided the knocks issue had more of a performanc... Trouble codes: P0103.
2002 Pontiac Grand Am SE1 2.2L Misfire, MIL Lamp on VIN: 1G2NF52F32
Thanks everone very much for the help. It was the ignition coil module. When the 2-3 ignition coil shorted out it also took the 2-3 driver in the module out too. Several members that replied that they have seen this before. Thanks again to all the menbers that... Trouble codes: P0300.
2003 Pontiac Bonneville SE 3.8L steering wheel VIN: 1G2HX52K23
In order to fix the problem, I knocked the bushing back onto the shaft. All the replies had a lot of great information thanks!
2001 Saturn L100 2.2L Horn VIN: 1G8JS52FX1
I received many replies stating a ground problem under the hood at various connections or a problem in a wire harness from the left to right side of the vehicle through the radiator support. We checked all grounds and all looked good. We followed some wiring d...
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