Question about 2003 Pontiac Grand Am
Run the fault codes
could be a TCM but more likely a servo/ solenoid for the gear
I would say that the car is running so ignition module will not be in the equation
Posted on Sep 18, 2016
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Posted on Jan 02, 2017
I would be interested in knowing if the thermostat is sticking open. Most Overdrives are prevented from engaging until the coolant temperature is over 177 degress F. Check you temp gauge...does it read Low? If so, change the t'stat, and see if that fixes your problem, or, if that does not help, get a complete transmission FLUSH, BEFORE you go out and get a rebuild. You just might save a ton of money.
Posted on Aug 29, 2009
I have the exact car w/same exact problem. I was told that ist was the speed sensor, which just so happens to be located inside the transmission w/a $400. repair bill.
Posted on Oct 07, 2009
The vacume hose on the vacume modulater on the trans mission is nt hooked to full engine vacume or the engine isn't making vacume.The governer will make the trans shift to second anyway at redline but it's preety hard on an old car to redline it just to find out/ It's possible that youv'e got the shift detent cable that hooks to the carb set too tight or it's stuck as if it's floored. with the cable disconnected it should shift out al the way real early as long as thirs vacume on the modulater. Gas mileage freaks that drive around slowly unhook th shift cale so the trans shifts into high gear real early. Not much for passing and acceleration but they get a little bit better gas mileage.
Posted on Sep 22, 2010
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