While flat towing my pickup truck behind my motorhome, on interstate 94 eastbound, in Minnesota I noticed smoke on my screen in the motorhome back facing camera. I safety pulled over to a truck rest area in Avon Minnesota. I went to investigate and realized that the pickup truck had flames coming from underneath the hood. Because of the fire and heat I wasn’t able to release the pickup truck from the motorhome which ultimately caused the Motorhome to catch fire as well. Police and fire department were called and both the Motorhome and pickup truck were totaled. My insurance company has possession of both vehicles. I previously had electrical problems with the pickup truck and took it to the Chevy dealership to address the issue. Evidence of module overheating with traces of burn were found on one occasion. I’m uploading photos of the police report and work orders from the dealership. No one was injured but all of our belongings were destroyed or damaged from the fire. We were left with nothing but what we had on at the time.