Where can I find step by step R&R procedure for heater core?
2002 GMC Sonoma 4wd 4dr 4.3L V-6

Steam on the inside of the windshield, 2002 GMC Sonoma 4wd 4dr 4.3L V-6, time for a heater core, radiator too. Where can I find step by step R&R heater core?
Same road trip, rear differential filled up with water, burned wheel bearing and axle shaft. Never in deep water. Just deep ___t .


Please Mr Mechanic, change the water in my rear end.