Engine Removal - v8 GMC Pickup R1500

Van

1. Disconnect battery cables and drain cooling system. Remove engine cover, air cleaner and air stove pipe. Remove coolant reservoir, grille, upper radiator support and lower grille valance. Disconnect automatic transmission cooler lines (if equipped) and radiator hoses.
2. On A/C equipped models, discharge system and remove condenser and vacuum reservoir. Remove washer jar with bracket, radiator brackets, radiator and shroud. Remove power steering pump and set aside (if equipped).
3. Disconnect wiring from firewall connection. Disconnect accelerator cable and remove carburetor. Remove thermostat housing, oil fill pipe and disconnect heater hoses. Remove cruise control servo, transducer, and bracket (if equipped).
4. Raise vehicle. Disconnect exhaust pipe at manifold. Remove drive shaft and plug extension housing. Disconnect shift linkage and speedometer cable. Disconnect fuel and vapor hoses from engine. Remove transmission mount bolts and engine mount bracket-to- frame bolts.
5. Drain crankcase. Raise engine slightly and remove engine mounts. Block up engine with wooden block between oil pan and crossmember. Lower vehicle and attach lift equipment. Remove engine and transmission as an assembly.

All Other Models

1. Remove hood, air cleaner, accessory drive belts, fan and water pump pulley. Disconnect battery cables and drain cooling system. Disconnect all hoses, lines, linkage and wiring from engine.
2. On A/C equipped models, remove compressor and set aside. Disconnect transmission oil cooler lines (if equipped). Remove radiator with shroud. Remove power steering pump (if equipped). Disconnect fuel lines. Raise vehicle and drain crankcase.
3. On 4WD models with automatic transmission, remove strut rods at motor mounts. Disconnect crossover pipe from exhaust manifold. Remove flywheel or converter inspection cover and converter-to-flex plate attaching bolts.
4. Remove starter and wiring along right pan rail. Support transmission and remove bolts from engine to bellhousing. Remove lower engine mount bracket frame bolts. Lower vehicle and attach lift equipment. Remove engine.

1. Disconnect batteries. Remove headlight bezels, grille, bumper and lower grille valance. Remove hood latch, washer jar, upper fan shroud and tie bar, and engine cover. On A/C equipped models, discharge system and disconnect condenser lines and remove condenser.
2. Drain cooling system and remove radiator hoses at radiator. Disconnect engine oil and automatic transmission cooler lines. Remove radiator and fan assembly. Scribe mark on front cover at injection pump flange and remove fuel injection pump.
3. Raise vehicle. Disconnect exhaust pipe at manifold. Remove inspection cover, flex plate-to-converter bolts, and motor mount through bolts. Disconnect block heater and ground wire at element. Remove bellhousing-to-engine bolts and starter.
4. Lower vehicle. Remove cruise control transducer (if equipped). On A/C equipped models, remove rear brace, disconnect lines at compressor, and remove brackets and compressor. Remove power steering pump and set aside (if equipped). Remove oil fill tube upper bracket and glow plug relay. Disconnect oil pressure sender.
5. Remove air cleaner resonator with bracket and transmission fill tube nut. Disconnect heater, radiator and by-pass hoses at crossover. Remove alternator upper bracket and coolant crossover. Disconnect fuel lines at fuel pump. Attach lift equipment and remove engine.

1. Disconnect batteries. Raise vehicle. Remove inspection cover. Disconnect torque converter and exhaust pipe. Remove starter, bellhousing bolts and motor mount bolts. Remove wire harness, automatic transmission cooler lines and front battery cable clamp at oil pan.
2. Disconnect block heaters. Disconnect fuel return and oil cooler lines at engine. Remove lower fan shroud bolts. Lower vehicle. Remove hood and drain cooling system. Remove air cleaner with resonator and primary filter from cowl. Remove harness from clips at rocker covers and disconnect glow plugs.
3. Disconnect ground cable at alternator bracket, alternator wires and clips. Disconnect TPS, EGR/EPR and fuel cut-off at injection pump. Disconnect EGR/EPR solenoids, glow plug controller, temperature sender and move harness aside. Disconnect left side ground strap.
4. Remove fan, upper radiator hoses at engine, and fan shroud. Remove power steering pump and belt. Remove power steering reservoir and position aside. Disconnect vacuum at cruise servo and accelerator cable at injection pump.
5. Disconnect heater hose and lower radiator hose at engine. Disconnect oil cooler lines, heater hose and overflow at radiator. Disconnect automatic transmission cooler lines. Remove upper radiator cover, radiator and detent cable. Support transmission and remove engine.

7.4L

1. Remove hood and air cleaner. Disconnect battery and drain cooling system. Disconnect radiator and heater hoses. Remove radiator and fan shroud. Disconnect all hoses, lines, linkage and wiring from engine.
2. Remove power steering pump and A/C compressor (if equipped). Raise vehicle. Drain crankcase and separate exhaust pipe from manifold. Remove starter and torque converter bracket at transmission rear mount.
3. Remove bellhousing cover and flex plate-to-converter attaching bolts. Remove motor mount through bolts and bellhousing bolts. Lower vehicle. Using floor jack, raise transmission. Attach lift equipment and raise engine. Remove motor mount-to-engine brackets. Remove engine.