OEM 2003 Chevrolet Trailblazer Intake Manifold

2003 Chevrolet Trailblazer Intake Manifold Parts and Q&A

• Q: How to replace the intake manifold on 2003 Chevrolet Trailblazer?

  A: Begin Intake Manifold replacement by removing the Throttle Body and pcm followed by removing all harnesses from the engine harness bracket. The front differential vent hose should be detached from its bracket clip followed by removal of the engine harness bracket bolt to pull off the bracket. The first step includes disconnecting the map sensor electrical connector followed by braking the crankcase ventilation hose and booster hose. Caps off the generator before loosening the Intake Manifold bolts to finally extract the Intake Manifold itself. The installation process includes placing a new Intake Manifold Gasket before setting the Intake Manifold on the engine and tightening its bolts to 10 nm (89 inch lbs.). Put the booster generator and brake hose back into their correct position. Apply gm p/n 12345884 (Canadian P/N 5728223) equivalent lubricant to the inner hose diameter before reinstalling the hose and attaching the map sensor electrical connector. Reattach the engine harness bracket, securing it with the bolt tightened to 50 nm (37 ft. Lbs.)next comes installation of the front differential vent hose to engine harness bracket clip. The last step includes connecting all harnesses to their correct locations while installing the pcm followed by reinstallation of the Throttle Body.