Shop for one retractable tonneau that suits you. GMC trucks offered in various shapes and sizes. You'll want a truck bed cover that does not only fits appropriately, additionally one having a streamlined designing. This means the tonneau will blend together with truck, not stick out like a painful thumb! What determines this are organic used methods it's build. The low-profile contoured canister design works of great help for GMC vehicles.
The next test involves cranking the car, and being safety aware (no hanging jewelry or long hair) and measuring voltage at the car battery terminals. Look into the work truck voltage at the meter as someone else cranks the vehicle. The voltage should not drop below nine or ten volts. For you to repeat this test to get an accurate examining through. If the voltage is not within spec consider a new battery, or have your starter professionally tested.