It was time to change my oil today. While having the oil filter out I thought now is the time to change out the non working block heater. Called local Dodge dealer for price $83. 00. Went to Cummins in my area $23. 00. Noticed old heater 750 watts p/n 3940911. New heater 1,000 watts p/n 3942197. This should heat faster. Hope it lasts longer than the old one. Only used it a dozen or so times.