Johnson wanted to buy a new Ford truck to pull his $5$th wheel travel trailer. He told the dealer the exact measurements and weight of the $5$th Wheel, and he also told the dealer he would be driving in the high Sierra mountains so he wanted to be sure to have sufficient engine and braking power. Based on these specifications, the dealer recommended a new Ford PIZZAZ $450.$ After the first few trips, he notified the dealer that that the Pizzaz did not have enough power to go uphill and the brakes overheated going downhill. Despite many warranty repairs, Johnson concluded that the engine and brakes were not suitable. What should Johnson do$?$