How to Replace the Head Gasket on a 2000 GMC Sonoma 4.3

The Sonoma compact pickup truck was introduced by General Motors to the North American market in 1982. Sonoma pickups were known for their durable and reliable engines, but they still needed to be serviced from time to time. One of the problems the Sonoma engine could face was a blown head gasket.

Step 1 - Disconnect the negative battery cable. Drain the engine coolant. Remove the engine cooling fan assembly. Remove the power steering pump mounting bracket. Remove the power steering pump mounting bracket stud from the cylinder head.

Step 2 - Remove the lower intake manifold. Remove the exhaust manifold. Remove the spark plug wire harness and the spark plug wire support. Remove the ground wire bolt and the ground wire from the rear of the cylinder head. Make sure you secure the ground wire out of the way.

Step 3 - Remove the bolt holding the fuel pipe bracket to the rear of the cylinder head. Now you have access to the cylinder head gasket. Remove the cylinder head and gasket. Clean the engine block and the cylinder head sealing surfaces. Clean the cylinder head bolts and the engine block bolt holes.

Install the new cylinder head gasket. To re-install all parts follow the same procedure in reverse.

TIPS: Make sure you disconnect the negative battery cable before you start working. If you do not do this, it can cause damage to the electrical system of your car. Clean all dirt, debris and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.

THINGS YOU'LL NEED: Set of screwdrivers, Torque wrench

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