Where is the headlight relay located on a 1993 GMC 1500 pickup

SOURCE: 1993 gmc c1500 buying distribtor

the last one i bought did,it came with everything except the cap and wires,good luck.

SOURCE: 2000 GMC 1500 4wd

Make sure that ypur parking brake is completely released because if it is engaged even slightly the daytime lights will trun off. If that's not the problem then check the bulbs.

SOURCE: Rear-end grinding noise in 1993 GMC Sierra 1500

your description sounds like the gears inside the the same differential you just replaced.

SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control

May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.

SOURCE: 2004 gmc sierra 1500 blower motor location

The blower motor is on the passengers side under the dash.You might have to remove the a lower panel.This is the insulator panel.If the blower works at all just turn it on and follow the noise.Hope this helps.Good luck.