Dorman 977-000 Throttle Position Sensor Compatible with Select Models

After having experienced the dreaded "decreased engine power" business, I connected my reader and found it said the error was with the Throttle Actuator Control (TAC); the little brain box mounted to the firewall by driver's side hood spring. So I purchased that from Rock Auto since Amazon wouldn't ship that part to CA for unknown reasons (even though it's been in use on my vehicle for the past 13 years straight, in CA). That install was simple, but then saw additional videos where folks said they did the same thing and the problem returned, and that the actual problem was the TPS. So I grabbed this TPS retrofit kit and installed in place (didn't remove the throttle body like many videos show people doing; to clean I guess). Removed air intake; two 5/16" nut driver hose clamps. Took photos of the existing 20 gauge wire harness wire configurations, as the new harness has all white wires (16 gauge). Used the shrinky-dink solder sleeves (Airnix SST-S21; from Amazon) to reconnect, using doubled-up aluminium foil as a backing for the heat gun (Wagner HT-400; also from Amazon). Don't care for mechanical crimping on applications like this, even though it comes with butt connectors. Soldered first connection, let cool before moving the wire out of the way, then repeated 7 more times for remaining wires, matching their position to old plug harness. Then came drilling out the rivets on existing TPS, to remove from TBI. Used countersink bit (as I had one, and allowed drill a little more access than using 3/8" drill bit) and needle nose to hold backside while drilling x4. Covered TBI with foil to make sure no drill cuttings got in there. Pulled off old TPS, noting the alignment of everything inside, so I could make sure new TPS was in same position. Rubber gasket on old was stuck to throttle body, so pulled that off. Replaced and bolted on with provided 7 mm hardware. New connector plug was a bit tight, so put some wire lube on male connector side, and it went right on. Reinstalled air intake, turned on ignition to send power, but not start, figuring the electronics would need a refresh for a few seconds. Turned key off, then started right up no problem. Everything is running fine now, and it seems to shift more smoothly. Prior to new TPS, trans would hold on to 1st and 2nd gear up to around 2500 rpm, with a hard shift. Now it let's go at right about 2000 rpm, which makes for smoother acceleration/shifting. Don't know if TPS is directly related to shift points, but it's definitely smoother now. Took me about an hour to do, and was definitely cheaper than having a shop do it, even with earlier TAC replacement. As I believe the shop will tell you that an entire new TBI is needed (of course).

I have this on my 2003 2500hd. Much cheaper than buying a new throttle body (which I did about 10 years back). It's been on there about 10 months now and has worked well. Fit well. Installation was pretty easy.

Worked very good no issues after 1k miles

If you have checked the grounds and replaced this the only other thing I can recommend that solved my dreaded Reduced Engine Power message was replacing the Accelerator Pedal Position sensor. This Throttle Position sensor has helped in the past but this time it was the accelerator pedal sensor that resolved the problem. Both are easy to replace.

Solved the other 50% of the problem. Always buy this unit along with the Accelerator Position sensor that goes on the pedal and save yourself some time.

Fix my reduce power issues!

I liked the extra long cabling on the connector, it made it easier to check if there were any crimps or breaks in the existing lines. it also made it easier to reroute the lines out of the way of any heat or pinch sources, fitting easily into shielded loom protection sheath. I didn't have any calibration issues as I also changed out the foot pedal TPS at the same time.

I've had this on for about a week now and haven't had reduced engine power since installation. I started by just putting on the new wiring harness and that worked for about 2 days and then REP started again. I did the next step and removed the throttle body and drilled out the rivets, put the new sensor on, and put the 4 included bolts in. The total time for this was maybe 30 minutes and zero issues. I have driven my truck several cold mornings and haven't had a single issue, so I believe this is the fix I needed. The wires are much thicker on the new wiring harness compared to the factory wires. If I was going to do it again, I would start with the sensor on the throttle body first so you don't have a bunch of spliced wires. I had read that the wiring harness is the problem a lot of times. I decided to start there, unfortunately it was not the wiring in my case, so now I have a bunch of splices that I have to worry will come loose down the road.

My Silverado had most of the classic symptoms of a bad TPS: late shift from 1st to 2nd, harsh shifts, dead spot on the accelerator and jerky acceleration. I purchased this Dorman TPS and replaced the factory one on my truck. WOW!, what a night and day difference in performance! I am definitely very happy! I'm even happier that I didn't have to buy a new throttle body(which without this part, is the only way to get a new TPS, as the factory one is riveted to the throttle body, and costs hundreds and hundreds of dollars from the dealership) Installation was a piece of cake, I disconnected the ground from the battery for safety first as you are dealing with an electronic part. Then just drill out the head of the old rivets, remove the rivets, place the new TPS in position, making sure the electrical contacts are aligned and press it to the throttle body. Fasten with the bolts provided. I didn't use the replacement wire harness, as the factory one on my truck was still in good condition. It plugged in easily to the new TPS. Thank you Dorman for making it easier to repair vehicles for people who can't afford what the dealership is charging.

This was a perfect solution to the problem. Quick easy fix.

I bought this for someone else! But they say that it works great

It’s the one I was looking for! It fits. But didn’t solve the issue I was trying to fix. But this part was exactly the one it was suppose to be and is still on my truck now.

Item was very easy to put into place. Little bit of re-wiring and needed some extra tools to get the job done. If you're ever doing this take a picture of your wiring before you start. I took a picture just to make sure I didn't screw up.