later GM truck gauges use 90 ohm gauges and senders, which have a range of about 0-90 - the Sunpro would have a range of about 33-240, can't mix n match, with aftermarket gauges you need the appropriate aftermarket sender

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot