20 Most Recent 1987 GMC S-15 Pickup Questions & Answers

check the fuel pressure this year truck known for bad fuel pumps especially after 80k

1987 GMC S-15... | Answered on Jan 31, 2015

These two diagrams are for Chevrolet engines Small block v-8 and 4.3 v-6 Chrysler 2.5 4 cylinder has coils only so 1-4 and 2-3 are the paired units

1987 GMC S-15... | Answered on Apr 19, 2014

To replace the ignition switch remove the horn pad be careful the wire is still attached to the turn signal switch the plastic piece push down and turn it comes out then remove snap ring on the end off the steering wheel then nut place a dot of finger nail polish on the shaft and wheel for alignment purposes use a steering wheel puller once off then install a lock plate puller compress down and remove lock ring once removed (lock plate) this is spline d to go on one way then take the cancel cam off (slides off) remove turn signal lever screw and turn signal screws lift up to gain access to the ignition switch retaining bolt a small piece of plastic is covering the screw that is the key buzzer switch it just pulls out be careful not to drop the spring steel retainer down the column it does not come out that easy and does not install that easy either. Place ignition in the on position remove and put the new one in the same way this allows the key buzzer to go in with out interference from the plastic shoe that's part of the switch. the lock plate tool can be rented from the parts store.

1987 GMC S-15... | Answered on Apr 19, 2014

easiest , is to pull the steering wheel... there is a screw / clip that holds the lock bracket in place........ i've seen a few lock specialist do it with out taking the st. wheel off... but $$$$$$'s ..

1987 GMC S-15... | Answered on Apr 12, 2014

look directly under the switch where the key goes in. there should be a small hole. Insert the key into the ignition then find a pin or a small tool that will fit into the hole. press it inward and this will release the lock that holds the keyswitch in.

1987 GMC S-15... | Answered on Apr 12, 2014

you need to back bleed the system.
snapon and parts stores sell a bleeder but for many year i have use just a simple pump oil can and a hose to connect to your bleeder fill your oil can with brake fluid and with the cover off you master. now just pump fluid up therw your master .

1987 GMC S-15... | Answered on Feb 08, 2014

Use the yellow bottle of HEET dry gas to rule out water in fuel.
Clean/replace air filter.
Clean the air filter housing

1987 GMC S-15... | Answered on Jan 14, 2014

u have a blown head gasket

1987 GMC S-15... | Answered on Nov 18, 2013

is it over drive control wire plug in...?


1987 GMC S-15... | Answered on Oct 07, 2013

Firing Order: 1-5-3-6-2-4


1987 GMC S-15... | Answered on Aug 14, 2013

You replaced the starter and solenoid. Did you check to see if you have battery power at the large starter post, and on the small wire coming from the key switch ?

1987 GMC S-15... | Answered on Apr 26, 2013

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replace iginition switch

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