20 Most Recent 1988 GMC S-15 - Page 3 Questions & Answers

pop off the top,, you'll see the float , just be sure not to drop anything into the carb opening,, there is a little wire that holds it in place,, they pry off pretty easy , remove that , and shake the float , if you hear anything in it, replace the float , its leaking, the setting should be the same when you put the new one on, if the float seems ok,, once you pop it off, theres alike a little plunger under that ,, remove it, and make sure nothing is in the way ( dirt or other ****, and re assemble it

Code 33 means MAP sensor signal has low vacuum or circuit voltage is high here is the tricky part it can also point to a failed distributor reluctor so do this inspect the vacuum hose that attached to it at idle is there full vacuum then check the connection it safer just to replace it including the vacuum hoses if the code comes on check the timing make sure it correct also when you floor it does it stumble or cough if it does its the whole distributor will need to be replaced

check for a vacuum leak

The Wiper Control Rod under the cover has a Push on Pivoting Arm and the Ball Broke and will not work the wipers until it is replaced

This is never an easy job and that is why the labor charges are high for this repair. I know of no place you can get detailed instructions on how to get to the core. You basically remove enough of the dash surround to gain access to the core. Just go slow, take photos or video if necessary to remember how everything fits back in place. If you will search YouTube with the term "heater core replacement 1988 S-15" you may get some help.

sound like fault in idle air control valve or ecm is faulty.

there is a locking C clip between the handle and the door panel were the handle pivots on the regulator shaft.there is a thin plastic spacer that keeps the handle from rubbing on the door panel and sometimes the clip is between it and the handle.there is a tool specially for this but you can use a flat bladed screw driver and push the clip off of the handle groove that it sits in.then you can remove the handle.

take it right back they should have some kind of warranty

YOU WILL HAVE TO REMOVE THE BLOWER MOTOR TO SEE WHAT THE PROBLEM IS. THE SQUIRREL CAGE MAY BE BROKEN OR LOOSE. THEN YOU WILL HAVE TO REPAIR OR REPLACE THE BAD WIRE{S}.

Any high quality brand name trans fluid is fine. I have a preference for Quacker State.

it used r-12 and the system should be evacuated, different oil put into the system and new fittings installed on the low and high pressure ports, then filled with 134a-use a little less than what the r12 capacity calls for as well.

If you can`t get it off then you haven`t got all the bolts off.Make sure and check it over real close.There should be 3 rows of bolts.Look under the rocker arms.Depending on what motor you have.A slight nudge with a pry bar and it should come off.Hope this helps.Let me know Good luck.

You checked the fluid and it is full? Also have you checked to see if the T.V. cable was reinstalled correct and adjusted right?

Timing chain, water pump, possibly valve stem seals and valve guides.

They are inside the tank if it is fuel injected, If is has a carb then it is mounted on the engine block