On all sending units and oil pans.Must be 18 years or older. Gas Tank for 1989 GMC JIMMY Gas Tank for 1989 GMC R1500 SUBURBAN Gas Tank for 1989 GMC R2500 SUBURBAN Gas Tank for 1989 GMC V1500 SUBURBAN Gas Tank for 1989 GMC V2500 SUBURBAN Gas Tank for 1989 GMC S15 PICKUP Gas Tank for 1989 GMC S15 JIMMY Gas Tank for 1989 GMC R2500 PICKUP Gas Tank for 1989 GMC R3500 PICKUP Gas Tank for 1989 GMC V3500 PICKUP Gas Tank for 1989 GMC C1500 PICKUP Gas Tank for 1989 GMC C2500 PICKUP Gas Tank for 1989 GMC C3500 PICKUP Gas Tank for 1989 GMC K1500 PICKUP Gas Tank for 1989 GMC K2500 PICKUP Gas Tank for 1989 GMC K3500 PICKUP Gas Tank for 1989 GMC SAFARI Gas Tank for 1989 GMC P25/P2500 VAN Gas Tank for 1989 GMC P35/P3500 VAN Gas Tank for 1989 GMC G25/G2500 VAN Gas Tank for 1989 GMC G35/G3500 VAN Gas Tank for 1989 GMC G15/G1500 VAN Parts Hotline I hope help you with this (remember rated this help) Good luck. Distributor rotation: counterclockwiseДЇig. DO NOT EVER remove more than one wire from the distributorД¬ap at a time unless you tag ALL wires and towers to assure properДЇig. Sequence (depending on direction of distributor rotation) the engine As longДЄs the remaining wires were connected in the correct firing order 1 cylinder was at TDC of theД¬ompression stroke (valves closed, ready for the plug to fire). 1 spark plug tower at any position (360Дegrees) in relation to the rest of the motor, as long as the rotorДЄligned to the No.

This is trueД«ecause any distributor which has been removed and reinstalled may haveД«een installed with the No. Tower positions in relation to the rest of the engine. These figures depict a firing order where the distributor cap terminalsДЄre relative to EACH OTHER only and they do not necessarily depict the Wires MUST be labelled before they are disconnected. Installation of a distributor, cap or spark plug cable is that all The most important thing to remember about the removal and To avoid confusion, ALWAYS replace spark plug wires one at a time. Also make sure you remove the bracket around the two entry hoses if it has one. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws. You'll need to 'roll' the box out from under the dash depending on how much of the dash has been removed. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. The housing is usually held together with screws or clips, it changes year to year. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Look around, what you believe to be, the perimeter of the heater box. If the dash is removed you've saved about 9 10ths of the job endurance. SOURCE: Replacing heater core in 2000 GMC sonoma.

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