K 1500 Truck 4WD V8-454 7.4L (1988)
View D
View E
E. Add one additional 3/16" hole to plastic bracket and two 1/8" holes in air cleaner at proper location, using revised bracket as hole template
(Views C and D).
F. Mount bracket so map sensor vacuum connection faces down toward engine, using two 8-3x1/2" sheet metal screws, P/N 447164.
G. Install vacuum hose harness, P/N 10129600 (see Views D and E).
Important
On trucks not equipped with an accessory vacuum fitting in the manifold, install fitting, P/N 14088336 and use caps, P/N 343350 to plug any
unused port.
H. Reinstall electrical.
4. On 1987-89, Check the control idle speed.
