2005 Silverado 1500HD Speedometer not displaying correct speed

ur acuator doors are bad usually happens when battery goes bad or is unhooked google sparkys answers and theres how to and pictures thats how i fixed my 03 1500hd also until i found out how to fix id go to the fuse box under hood while truck was on and pull ac fuse wait 10 sec replace and it usually blow out front vents until i turned truck off if u recently had battery go bad or unhooked look at recalibration on sparkys answers its simple and might be all u need

03 to 07 had Faulty stepper motors in the guage clusters. The tach and speedometer go first because they move more than the other guages. G.M. is covering them with under 80k on the truck. If you have one with more miles on it ebay sells the stepper motors cheap and anyone with a soldering gun can do the job with the directions supplied.

If the speedometer doesn't work, I usually look for a VSS or vehicle speed sensor, but on the Ford Escape, the Wheel Speed Sensors detect speed.

The ABS light may be on if there isn't a signal going from the speed sensors to the ABS module, or the module is bad, itself.

I don't know about the 4 wheel drive light blinking, but it could signal trouble in that system, as well, as far as the electronic control of 4 wheel drive or the Transmission Range selector Also, does the transfer case have enough fluid in it?

Transfer Case NOTE: Repair of the transfer case is limited to seals, gaskets and output flange on automatic transaxle vehicles only. In vehicles equipped with a manual transmission, or if any of the geared components, tapered roller bearings, case cover or internal shafts fail, a new transfer case must be installed.
NOTE: The transfer case is sealed from the transaxle and has its own oil pump. The transfer case uses SAE 75W-140 synthetic gear lubricant and holds 12 ounces. The transfer case fill plug is located on the housing cover.

The speedometer problem could also be a bad speedometer gauge, but that is rare, these days and is not indicated by the ABS light being on that says that maybe a signal has been lost to the wheel speed sensors themselves.

I hope this helps to understand what may be going wrong, even though you did the right thing by changing the wheel speed sensors.

Oh, by the way, I would scan the OBD-II computer with an ABS Brakescan tool to see if any particular wheel is still not reading or sending speed data to the ABS module.

May I suggest the Actron Brakescan tool which covers most domestic vehicles from 1996 to 2005?

Good luck on this repair.

unless there is a problem with one of the calipers. no way I would replace calipers in the course of a routine brake job.

Chevy is having problems with the steering columns on these models. Feels like a jiggle in the steering wheel when you hit a bump of any kind. Cost about $75 at the dealer for a new part.

did you put aftermarket tires on it? or
check the speedo sensor on the tranny

177 ft lbs

Sounds like a bent fork in the transfer case. It is a common problem with your truck. The transfer case is a np236. If it just recently started doing this, the rebuild will cost around $800. If the 4wd has been acting up for a while, the planetary will probably need changed, which is another $200.

Replace the speed sensor, but also make sure you clear any codes, even if none are showing up, disconnect the battery for about 1 hour. After that drive it easy for a while, so it can relearn.