I have a 1998 gmc Sierra standard 5 speed started running funny then just stopped moving starts good engine runs fine clutch engadges but when in gear now revs up as if it were in neutral Also before was losing rad fluid and making a sound by front passenger side glove box like a fish tank added stop leak it's no lonnger leaking but still making water noise thanks

Sounds as if the clutch is no good or is engaged constantly. Possible clutch worn out or throwout bearing is seized on input shaft

About 56,700 results (0.76 seconds) Search Results

GMC Sierra 1500 Questions - Truck suddenly stops running ...

www.cargurus.com > Questions > GMC > Sierra 1500

CarGurusJul 11, 2013 - Truck suddenly stops running, acting like it's out of fuel. ... start it and let it run until it dies then check the pressure and shut the key off. ... Was running fine and then turned off as if the ignition was turned of. .... Well mine was a loose battery connection that just shut down the vehicle completely while driving.

1998 1500 5.2 Shuts Off Randomly - CarGurus

www.cargurus.com > Questions > Dodge > Ram 1500

CarGurusAug 29, 2011 - I let it sit for a second then tried to start it back up and it wouldn't start.... 2006 ram 1500 randomly dies while driving 13 answers ... truck started outrunning fine but would randomly die. wait a few ... Used GMC Sierra 1500".

GMC Sierra 1500 Questions - started stalling and dying ...

www.cargurus.com > Questions > GMC > Sierra 1500

CarGurusJul 28, 2008 - The truck starts and dies. Have to give a little gas to keep running.While driving have to 2 foot it so it won't die. Wants to die when I come to a ...

Engine Dies and Then Starts Right Back Up

www.justautorepair.com/chevrolet/blazer/stalls-starts-up

Im guessing it's a 4.3 L engine. Sounds like your coil is acting up when the truck heats up. Bad coil, or small wires going to the coil

That would be the clutch release bearing (also called the throwout bearing).
The bearing is a sealed unit that eventually wears out and needs replacing.
Unfortunately, the only fix is to pull the transmission and replace the bearing.
And while you're at it, you might as well put in a new clutch and pressure plate while it's apart. Or not, depending on your budget. The release bearing runs in the neighborhood of around $40. If you can stand the noise, the bearing may last for quite a while, but eventually it may sieze and leave you stranded.
Good luck.

anti-thief system may be the cause

It may be the transmission input shaft bushing or bearing, located in the rear of the engine crankshaft, in front of the clutch assembly. If the bushing or bearing is dry (needs to be greased), the input shaft will still try to turn with the engine rpm, even though the clutch pedal is depressed. Also, the clutch disc may not be fully releasing, which could possibly be corrected by adjusting the clutch pedal linkage. good luck

any engine codes? could be the throttle position sensor

The anti thieft system is keeping it from running.

Will the engine start on its own after the engine is warmed up?
Let me know.
Regards,

Possibly faulty ignition module is the problem, stalls when engine is hot when you sit for a while it cools off and runs again until it heats up again, those are usually the symptoms of a bad ignition module and after a while it may give out all together and not run at all, usually if the module is at fault it shuts down the fuel pump so the engine don't load up with fuel, do to when engine continuously cranks over the injectors never stop squirting fuel and flood the engine do to lack of spark which is produced by the module, this could possibly be your problem.