My 1999 S10 is becoming hard to shift, is this a clutch issue?

what transmission, here. automatic or manual stick shift?
S10 not blazer S10

old cars this old (pre digital documents) are hard to find and when found are not complete. or poor .
A/T box?
the PRNDL switch must be good. and cranks in both Park and neutral.
yes the relay clicks too, if not the PRNDL is prime bad part.
there is fuse named CRANK.(1st inline here)
the starter can be hot wired (a test) to prove starter work.
if stick shift TRANNY it is called the clutch switch. to crank,
some books say hood up fire wall, center is relay. IDK


see why we ASK transmission first/
if the relay does not click the fuse crank blown
or PRNDL is dead only on P mode, try N.
if stick shift,, clutch CCP switch bad or just mal-adjusted.
ST below goes to the relay then to starter solenoid
the relay colors are there. Green or Purple.

PRNDL is on side of TANNY part of shift linkage.

is your clutch pedal soft? If so you could have a slave cylinder leaking or maybe just in the the system bleed back up. Might be that the clutch drive disc is burned up making it hard to shift

The clutch is not adjustable it is fully hydraulic. That means it is self adjusting, if the clutch pedal engages high on the pedal and the clutch is hard to push you need a new clutch plate and pressure plate.

The problem and the solution is clutch master cylinder and a slave cylinder

There is nothing electrical that will keep the trans from going into reverse. The direct clutches ( third ) are used in reverse. I would guess you have a direct clutch problem. Time for a rebuild or replacement.

a number of issues. Tcc regulator bore worn out, the infamous check ball seat it hammered badly, or/and calibration issues. I have seen all three issues on the same trans - often!

could be an issue with the clutch plates.., else get the gear box oil changed

It is an adjustment or clutch replacenment issue. Manual transmissions rarely have a lube issue unless you have seen a big puddle of very thick oil in the driveway.

I think I'd be looking at the clutch of this 16 year old vehicle. Unless you have the tools, time and skill to change the clutch, this is probably a job better left to a professional. Adjusting the clutch mechanism might help for a while but I think you will soon need a clutch job on your GMC.

Thanks for your question at FixYa.com

First thing to do,try to pump your clutch before you shift into 1st gear then if you feel makes better, most probably you have problem with your hydraulic clutch system, check the clutch line if there is an evidence of fluid leaking or it could be internal leak.

Second thing to do, check your transmission oil, may be it' s too old or you use a thick oil thats why when cold its hard to shift then when the engine rich the normal temperature(warm) the oil become thin and the shifting will smooth. Remember the very old oil become thicken and the purity is gone and can cause of hard shifting. in this regards i suggest you to change the transmission oil and check the used oil if there is small peace of metals, then you are in big trouble,

sounds like you have air in your hydrolic portion of your clutch system, you need to see if your slave cylnder or your clutch master cylnder is leaking fluid putting air in your system. If the case is that you have just a hard to get in gear such as only 2nd then i would have suspected your secronizer ring being bad. or if all gears seem to be hard cold then you would either have a leaking hydrolic cylnder or the wrong fluid in trans.