GM 15141559
Fuse Box

The first step to replace the underhood electrical center or junction block is disconnecting the negative Battery Cable. Open the junction block cover by pushing the tabs toward the interior and raising it upward. The next step involves lifting the fuse relay center cover upward until retaining tabs detach to remove it. Record the positions of the harness end bolts before removing the bolts together with the harness ends from the fuse relay center. Start by unscrew the bolts at the fuse relay center and retrieve it from the junction block bracket. Use downward pressure to unfasten the wiring harness ends from the bottom section of the fuse relay center. The vehicle needs junction block bracket retaining bolts removed before taking the bracket out. To install the junction block bracket position it correctly then start installing bolts at 6 n.m torque before completing with a 53 lb in final torque. Secure the fuse relay center into position with bolts which should be tightened at 6 n.m (53 lb in). Secure the harness end bolts simultaneously before setting the fuse relay center cover onto its bolt points and gently pressing it down to activate the tabs. The installation requires a final step which involves placing and pressing down the junction block cover until its tabs are engaged.

Remove the block base retaining nuts from the floor studs and take out the block base from the floor panel.

Position the junction block bracket and install bolts, tightening them to 6 N.m (53 lb in).