Try turning them around to see if polarity affects them.
What is the numerical number of the original bulb and the numerical number of the replacement LED bulb?
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Don't know where I'm going, spose I'll get there anyway.