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GMC 2500 Pickup Questions

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When i step on gas it cuts in and out. Sometimes when switch to reverse and drive it dies out. It will get up to speed but it cuts in and out several times before it does. It seems to act up more when it is colder. ?
I recently replaced my starter in my truck to do so i had to move the slave cylinder out of the way. After i installed the stsrter and re attached the slave cylinder my clutch pedal is as haerd as a rock, it wont move an inch. Did i ruin my slave cylinder or did i hyperextend it? And what can i do to fix my problem?
Not familiar with Chevy and just want to know how many gallons of antifreeze does my 91 GMC 2500 with a 350 take?
I feel the truck shake like it has a warped rotor , but I have changed them and turned them
Idle speed relay mounted on drivers side valve cover ...has four wire connects new on order at auto parts store has five wires not sure how to wire it in. To the old original four wire pattern
no fuel pump power and no ignition fire
need help regarding my truck. Last night I turned the key off, and instantly went to start it back up and the starter wouldn't turn.

I've changed starters in this truck before, so last night I put in the new starter and same problem. I left the truck over night. 1992 GMC 5.7 350 automatic transmission.

so today I went back and really went through things. My first thought was maybe i had seized my engine. So i decided to check the flywheel and crank pulley to verify they'd move by hand, they did. (Did a full turn on the pulley) I ended up buying a third starter and verifying my wiring was correct.

What is happening is my starter is engaging the flywheel but not spinning. After releasing the key the starter stays engaged, until I turn the crank pulley, I can hear it click back into the solenoid.

I'm feeling like perhaps this is an electrical issue(Not enough juice at starter) today I did hook up starter number one and two to the battery but not connected to the flywheel and the starter engaged and spun just fine. Makes me think it never was my starter.

I know I need to take a voltage meter and do some readings but I'm also curious is there a starter relay? I can't seem to find information about this online.

thanks in advance
The freon was low, so I added 2 cans & a can of the oil additive. It brought the pressure back in the correct range and worked fine for a few days. Now it is blowing extremely hot air & the pressure is still correct. The compressor seems to be running ok. Any solutions?
its a 2 wheel drive ext. cab
went to oreileys,three people searched the computers for two hours no luck went from 80s on up,trucks,vans,suburans,u name it they tried it still no luck,its 8 lugs a solid rotor not a floating
theres no power feed to the fuel pump
Truck won't idle. Stop sign have to have foot on gas & brake.
I have a problem with my 96 2500. Sometimes, usually shortly after starting, the engine runs a little rough like it's running out of gas and wants to die and does die if I don't keep the RPMs up. It is difficult to start right after it dies. If I wait 5 minutes, it seems to start up ok. Seems to be a fuel related issue. If I spray some starting fluid in, it will start right up. It runs ok after it runs for a while. 116K miles.
Cold or hot it happens.it only has 115000 miles on it.had it hooked up to a code reader and it says tps but it's brand new.replaced 4times to make sure I didn't have a bad one.
will restart but kill again. after sitting a couple of hours sometimes runs great again. code reader came up egr decel fail. no other codes. runs great when it runs.
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