Where is the transmission shift solenoid on a 1999 GMC suburban?

The transmission shift solenoid on a 1999 GMC Suburban isn't a single, easily accessible component like a simple switch. Instead, it's part of the transmission valve body , which is located inside the transmission itself.

Vous ne le trouverez pas à l'extérieur. Pour accéder aux solénoïdes de changement de vitesse, vous devrez retirer la transmission (un travail majeur nécessitant des outils et des connaissances spécialisés) ou, dans certains cas, éventuellement y accéder via le plateau de transmission après avoir laissé tomber le plateau. Even then, you'll likely be dealing with multiple solenoids, not just one.

Si vous rencontrez des problèmes de transmission , don't attempt to troubleshoot this yourself unless you have significant mechanical experience with automatic transmissions. Diagnosing and replacing solenoids is best left to a qualified transmission mechanic or repair shop. They have the tools, experience, and knowledge to properly diagnose the issue and make the necessary repairs. Improperly working on the transmission can cause significant damage.