1. Remove the fuel pump power fuse.
2. Start the engine.
3. After the engine stops, start it again and let it run for about 10 seconds to use up the fuel contained in the fuel rail to reduce the residual fuel pressure in the system.
4 Disconnect the engine control module (ECM) ground terminal from the intake manifold.
5. Drain the coolant from the engine.
6. Disconnect the supply air temperature (IAT) sensor connector.
7. Disconnect the crankcase ventilation hose from the valve cover.
8. Disconnect the air duct from the throttle body.
9 Disconnect the ignition coil connector.
10. Disconnect the coolant temperature sensor (CTS) connector (see figure T250 2.008)
11. Disconnect the Idle Air Control (IAC) connector (see figure T250 2.009)
12. Disconnect the throttle position (TP) sensor connector.
13. Remove the camshaft position (CMP) sensor
14. Loosen the air filter housing screws.
15. Remove the air filter housing.
16. Remove the timing belt cover upper part screws.
17. Remove the upper part of the timing belt cover.
18. Align the ignition timing mark on the camshaft toothed pulley with the mark on the rear timing belt cover.
19. Remove the right front wheel.
20. Remove the right front wheel mudguard.
21. Remove the accessory drive belt.
22. Disconnect the fuel supply line from the fuel rail.
23. Remove the power steering tube bracket mounting nut.
24. Unscrew the generator nut.
25. Remove the generator bracket mounting nut.
26. Remove the generator bracket.
27. Disconnect the brake booster hose at the intake manifold.
28. Disconnect any vacuum hoses that need to be disconnected and the electrical connector.
29. Disconnect the manifold absolute pressure (MAP) sensor connector.
30. Remove the crankshaft pulley mounting screw.
31. Remove the crankshaft pulley.
32. Unscrew the screws of the lower part of the timing belt drive housing.
33. Remove the lower part of the timing belt cover.
34. Slightly loosen the coolant pump mounting screws.
35. Loosen the timing belt tension by turning the coolant pump.
36. Remove the timing belt.
37. Disconnect the crankcase ventilation tube from the camshaft housing.
38. Remove the valve cover with gasket.
Caution: Avoid scratching, nicking or otherwise damaging the camshaft.
39. Remove the camshaft timing pulley.
40. Remove the rear upper timing belt cover screws.
41. Disconnect the spark plug wires from the spark plugs.
42. Disconnect the catalytic converter flange from the exhaust manifold flange.
43. Disconnect the oxygen sensor electrical connector.
44. Disconnect the heater supply hose from the coolant distributor.
45. Disconnect the coolant hose connecting the expansion tank and the throttle body.
46. Remove the front engine mount mounting bolts.
47. Disconnect the accelerator cable from the throttle body and intake manifold.
48. Gradually loosen all cylinder head mounting bolts in the sequence shown in the figure.
49. Remove the cylinder head mounting screws.
50. Carefully remove the camshaft housing.
Caution: When removing the cylinder head, do not allow engine oil or coolant to enter the cylinders. Otherwise, engine damage may occur.
51. Remove the cylinder head with the intake and exhaust manifolds installed on it.
52. Remove the cylinder head gasket.
Original version of the article on the website chevyman