20 Most Recent 1993 GMC Sierra - Page 3 Questions & Answers


take the top cover of then the two scews underneath taketose off

1993 GMC Sierra | Answered on Apr 09, 2014


on the side of throttle body with 4 wires iac motor is round and the connector is square
hope it helps

1993 GMC Sierra | Answered on Mar 20, 2014


check the ground to the engine, make sure the terminals are clean and tight on the starter and on the battery and have the battery tested.
24 months ago for a rebuilt starter is about the lifetime you could expect.
Did u change the battery cos' it was getting harder to turn the engine?
If the starter gets lazy (often a loss of windings due to varnish degradation) and hence a drop in power when activated. This wears batteries out and eventually the starter will fail. A lazy starter has that labored wuh wuh wuh sound instead of a faster regular sound
If you odnt find bad cables replace the starter.

1993 GMC Sierra | Answered on Feb 04, 2014


why would you do that .check the linkages from gearbox to gear stick may be loose.

1993 GMC Sierra | Answered on Dec 21, 2013


Your description, I take it, is a problem with the wiring harness going from the driver's compartment to the rear lights. If that is the case, the normal color code for GM is brown for tail lights, dark green for the right stop & turn, yellow for the left stop & turn and light green for the backup lights. Any black wires should be grounded. The white wire in the trailer harness is for a ground when used on a trailer. It sounds like you have the green and yellow T&S wires shorted together somewhere! Some of the later vehicles use separate stop and turn bulbs... these would have a separate wire for the stop lights only, but I don't think your truck is new enough for that. Good luck!

1993 GMC Sierra | Answered on Nov 26, 2013


Check to make sure the motors are moving hot to cold. The blinking control panel means it has self diag mode. Google how to get the heater control panel to go into self diag mode and when you get codes goggle them too . Prob bad control panel switch or unit

1993 GMC Sierra | Answered on Nov 08, 2013


clutches in auto transmission or low dirty fluid .

1993 GMC Sierra | Answered on Nov 06, 2013


check filter and fluid and replace if dirty or burnt smell check vacumm module and torque conert may not be good

1993 GMC Sierra | Answered on Oct 30, 2013


have you checked your altenator to see if it is charging the battery.

1993 GMC Sierra | Answered on Oct 24, 2013


have transmission code retrieve
nobody will give you a fix for your problems without code

1993 GMC Sierra | Answered on Oct 22, 2013


you may have some air in your lines

1993 GMC Sierra | Answered on Oct 05, 2013


the spark plug gap for gmc sierra with the 350 ci 5.7 is 0.35 Im not sure what it is for the other motors but if you have a 350 in a 1993 sierra its 0.35 I know this is correct because its on the sticker under my hood and im changing my oil right now so I just read it about 20 seconds ago....

1993 GMC Sierra | Answered on Sep 06, 2013

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