FAQs—GMC 1500 Series
What would be the recommended frequency for changing the automatic transmission fluid? How is this done?
Some technicians would say that transmission fluid change should be done every 30,000 to 50,000 miles. However, these numbers can change depending on the driving conditions and vehicle requirements and specs. Still, it would be best to stick to the recommended interval by the manufacturer, which is outlined in the manual. When changing the fluid, the system may be flushed to drain all of its fluid content. Others, however, just remove the transmission pan to get through the filter. In this process, not all of the fluid is drained. Some would not change the filter right away, although it would be best to have this replaced when changing the transmission fluid to keep the fluid safe from dirt and contamination. The transmission assembly should then be checked for metal bits and debris as these would indicate impending failure or breakdown.
Lately, I've noticed that the windshield washer spray of my GMC 1500 Series squirts a weak stream of wiper fluid. What part of the wiper system could be causing this problem?
Check to see if the spray nozzles are working or if there's a clog somewhere. A good trick here is to use a safety pin for cleaning the nozzle ends. If this won't do the trick, then you have to move on to the hoses that run from the washer fluid reservoir to the nozzles. Search for openings, kinks, or anything that can restrict the flow of fluid. If you still can't figure out the problem through these, you'll have to disconnect the hose from the reservoir and clear the clog using compressed air. Blowing compressed air through the hose will help get rid of dirt, scaling, and debris. Just be careful. Dirt and other small particles can get to your eyes. If this still doesn't work, then chances are, the washer pump is defective or broken. Check the pump and search for a fitting replacement.
Is it ok to just fill the windshield washer reservoir with water instead of wiper fluid? Water can clean the windscreen just the same.
Wiper fluid is used because water can freeze as the temperature drops, especially if it's below freezing point. If water is used, then the washer reservoir may crack. The freezing water will also damage the pump. Don't take the risk. The washer fluid is specially formulated to prevent freezing. It also contains chemicals that make it easier to clear dirt stuck on the windscreen. Plus, the fluid is quite affordable.
I'm thinking of undercoating my GMC 1500. Is this worth the money?
This will be a good option for your vehicle if you drive it in an area where it gets heavily exposed to road salt, which makes rust form faster. Also, if you see yourself driving the vehicle for a couple more years, this will be a good way to prevent corrosion. The undercoat will slow down rust formation and buildup.