2015 Silverado Z71 5.3L 4x4 Transmission/Converter Issues.

speeddemon01 · March 10

I have a 2015 Silverado Z71 5.3L 4x4 with 160k miles. Within the last couple of days it started off with a studer going up hills at low RPMs. Level Ground and down hill no issues. Full Throttle there was no issues. This morning the convert started slipping kinda like a bad clutch in a manual. This afternoon it seems a bit smoother and I didn't notice the slipping but the Transmission will not shift into 5th or 6th gear. Am I looking at a transmission rebuild and converter replacement or is there something simpler that I should be looking at?

MikeBMW · March 10

Have you had the transmission fix done?

Niklasbraun · March 12

On 3/10/2024 at 2:24 AM, speeddemon01 said:

2015 Silverado Z71 5.3L 4x4 Transmission/Converter Issues.

I have a 2015 Silverado Z71 5.3L 4x4 with 160k miles. Within the last couple of days it started off with a studer going up hills at low RPMs. Level Ground and down hill no issues. Full Throttle there was no issues. This morning the convert started slipping kinda like a bad clutch in a manual. This afternoon it seems a bit smoother and I didn't notice the slipping but the Transmission will not shift into 5th or 6th gear. Am I looking at a transmission rebuild and converter replacement or is there something simpler that I should be looking at?

Have you checked the transmission fluid level and condition? Low or dirty transmission fluid can cause all sorts of problems, including slipping and difficulty shifting.
Additionally, issues with sensors or solenoids could also cause similar symptoms.
If all electronic and fluid-related components check out, a more in-depth mechanical inspection of your transmission may be necessary. This means inspecting internal components like clutches, bands, and valves.