Rubberized removable protective guard has push button as the gauge will hold pressure. Button releases it or hold button to release air and the gauge will read what it is dropping down to. Sells for about 21.00 dollars. Works great. I have no interest in the company,assembled in the U.S.A.
http://www.getagauge.com/

Duramax Mass Airflow sensor pictured, unplug the connector, remove the two torx screws remove and give short bursts of the displayed cleaner to the sensor let it dry and reinstall insures better mileage with clean MAF sensor

Merchant Automotive wrench for removing water sensor from the bottom of a Duramax fuel filter, this is better for the sensor than using an Arkansas socket set on it. (channel locks)The small cut out at the other end fits the bleeder screw

Duramax fuel filter strap wrench made in the U.S.A. from Merchant Automotive

button removal tool for removing inner fender panel for access to a late model Duramax fuel filter from Merchants Automotive

Aluminum bleeder screw to replace the plastic one on the side of the filter housing, also fom Merchants automotive, plastic ones can either break or round off in time

Rod Holders screwed to a strip of oak, then used 3m 5200 to secure oak to roof. Use rubber bands to hold rod tips in the V shaped areas. Been on for a couple of years and two round trips to Florida.