Mescareno

2012 GMC Sierra 1500 SL 4.8L v8 4L60 with external trans cooler radiator from factory Usually my truck stays somewhere between 145-170 for normal running temps. However, during the stop n go traffic, drive thru, etc. my transmission will reach temps of 205-215. I did a tranny flush and changed the filter. Did not see or smell burnt fluid or any major metal pieces in the fluid or filter. Any ideas what I could do to keep the temps during when in these situations? Should I get a bigger external radiator or a bigger radiator with a fan?

2012 GMC Sierra 1500 4.8L v8 with the 4L60 transmission that has an external cooler from the factory installed. I have noticed that when in park or in line of fast food/traffic jams that my transmission temp goes between 205-225. When my truck gets moving again the temps go down. I was thinking about getting a bigger after market external trans cooler or adding an electric fan to the external cooler. I do not want to burn up my trans from temps going up and down. Thoughts???

I have a 2012 Sierra 1500 SL and currently my tailgate latch does not have a key to lock the tailgate. Wanting to have the latch with a key. Would it be easier to change the entire tail gate or just the latch? If its just the latch what other parts would i need besides the latch?

New to site and first time owning a truck. Unsure if this is normal or not 2012 GMC Sierra 1500 Crew Cab 4.8L 4x4 Truck runs at about 108 degrees for normal running transmission temp when in 2x4 which is low from what I am reading. When I put it into 4x4 temps jump to 150-155 degrees. Today when parked in 4x4 temps starting increasing into the 180 range and only had it in 4x4 for maybe 1 mile. I turned off the truck to let it cool down and put it back into 2x4. Temps started to drop down to the 140 range. Is this normal for both my normal running temp of 108 in 2x4 and fast increase when in 4x4?