P1623moderate severityPowertrain

Transmission Temp Pull-Up Resistor

on 2017 Chevrolet Silverado 1500 5.3L V8 EcoTec3 L83 ยท RWD

What this code means

The pull-up resistor for the transmission temperature circuit is faulty. This affects accurate transmission temperature readings.

Symptoms

  • Check engine light on
  • Erratic temperature readings
  • Abnormal shift behavior

Common causes

  • Faulty pull-up resistor
  • Bad transmission temp sensor
  • Damaged circuit wiring
  • Faulty control module

Diagnostic steps

  1. Scan for stored codes
  2. Check transmission temp sensor circuit
  3. Measure pull-up resistor value
  4. Inspect wiring and connectors

Other Powertrain codes on this vehicle

๐Ÿ”ง Database maintained under the daily editorial review of Chris Hackleman ยท Master Technician ยท 20+ years. Spot an error? Use the Help link above โ€” a human reads every report.
Stuck on this repair? Take it to The Diag Desk โ€” ask a master tech about this exact car โ†’ real human answer within 24h, never AI
โš  STILL BEHIND THE PAYWALL
The 2017 Chevrolet Silverado 1500 repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy โ€” and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Chevrolet Silverado 1500 โ€” $99 โ†’
Building an app?
Free API access to all this data โ€” 10 requests/day, no card required.
Get an API key โ†’
Run a shop?
Manage repairs, estimates, and customers with ShopBase โ€” $249/mo, all features included.
Try ShopBase โ†’