Have a 93 chevy 1500 2wd 4.3 5 speed, speedo dosent work, brake light is on, and heater dosent do anything (no blower motor functions) truck runs and drives fine but have noticed the check engine light come on after a little bit of driving and during deceleration it pops a little. Replace the speed sensor but nothing. I think these are all tied into one as it did this before and I pushed on the plug (speedo plug) and everything came back on. Cleaned plug and wires, but still nothing, checked fuses too all good. Any Ideas would help.

SOURCE: Chevy truck running rough 150,000 miles

Find out why the engine light is coming on, it is the info u probably need to fix the running rough problem. Most auto parts stores will read the codes stored in your trucks computer for free, write them down, and ask what they mean and how to correct the problem. If u need more info, return to this site w/ codes for further help.

Jerry Mace

• 42 Answers
• Posted on Mar 19, 2009

SOURCE: I have a 2001 Chevy

Replace the blower motor resistor. Remove the shroud below glove box, 2 screws and a snap-pop fitting. Be careful of the courtesy light. Remove the blower moter and disconnect the purple/black power connector to it - - you'll need this extra room to work with. 2 more screws, same size, 6.5mm on mine, 7or 8mm on some others, that holds the blower motor resistor in place. This replacement part is less than 40 bones at most parts store. Unplug, replace, re-install, test and you're on your way with about 2 hours of slow paced effort in your own driveway. Typical cost at a garage - up to $400, what a sham.

SOURCE: 1994 chevy 5.7liter v8 truck 2 wheel drive

I would start by checking spark modulator under the distributor not the cap but the distributor. two sets of wires from under distributor thats it remove dis cap 2small screws on drivers side removes it . You can take to checker or autozone they will check it for you hope this is it later good luck

SOURCE: 2006 chevy trailblazer heater blower motor not working

You might wanna check and make sure the heater switch didn't go bad. It could even be the blower motor itself.

SOURCE: 2005 Chevy astro van, 4.3L A/c, Blower motor,

It could be a bad blower motor - tap on the blower motor with the end of a hammer when you have the switch in the on position - if it comes on then it is a bad blower motor. If it doesn't come on I would check to make sure you are getting power and ground to the HVAC control head.