Chevrolet Silverado / GMC Sierra. Service manual - part 380
Fig. 513: Drilling & Tapping Threads Courtesy of GENERAL MOTORS CORP.
CAUTION: Refer to Safety Glasses Caution .
IMPORTANT:
The use of a cutting type fluid GM P/N 1052864 (Canadian P/N 992881), WD 40®, or equivalent, is recommended when performing the drilling, counterboring, and tapping procedures.