Planning your 6L90 purchase
Confirm the exact 6L90 application, converter, controls and drivetrain configuration. Do not substitute a 6L80 solely because the assemblies look similar.
Confirm my application with Big 3GM 6L90 Transmission Replacement & Rebuild Options
Start a 6L90 replacement or rebuild quote with the VIN, original transmission identification and diagnosis. Compare assembly-only and installed repair costs as separate scopes.
Identify the transmission before choosing a product
Model name, trim and engine displacement are starting details. They do not establish transmission interchange. Send the VIN, model year, engine code, 2WD/4WD configuration and a photo of the original transmission identification label.
These guides cover selected families. If your transmission code is different or unknown, request identification help; the absence of a guide or catalog match does not mean the assembly cannot be supplied.
Replacement or rebuild?
Compare the exact supplied replacement with rebuilding your existing unit. Ask what inspection and work are included, whether the converter is supplied, and what the selected written warranty covers.
Plan the installation
Include the diagnosis, cooling-system inspection, fluids, transferred parts and programming in the installer discussion. Confirm any required supporting work and warranty conditions before the unit is installed.
Confirm the delivered total
Catalog prices are for the listed product. Some ship-first offers include a disclosed refundable core deposit; other core/exchange terms are quoted for the selected product. Confirm freight, tax and installation. Multiple assemblies or mixed freight require a shipping quote.
Current catalog options
These are catalog product-name matches, not a verified vehicle fitment list. Open the listing for the exact application, assembly, availability and written warranty. Product prices exclude separately quoted core deposits and order-specific charges.
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Confirm my application
Product-name matches are browsing options. Big 3 must confirm the selected assembly against your vehicle details and the supplier record before purchase.
Send my VIN and transmission detailsInside the transmission
More than a case and a part number.
Follow our transmission work from the opened unit to the components on the bench. Bring us your vehicle details and symptoms so we can plan the right repair or replacement.
29 seconds inside the job
Watch the teardown unfold.
A stop-motion edit made from our shop’s sequential photographs. An opened transmission, component removal and a closer look inside.
An edited shop-work sequence, not an installation or repair tutorial.
Have a project in mind?
Tell us what you drive and what you want to change.
Actual Big 3 shop projects shown. Photos illustrate different jobs and stages of work; included parts, fitment, finish and services are defined by your selected listing or written quote.
2014 and newer GM trucks & SUVs
Start with your engine code
Shopping for a 5.3L or 6.2L replacement? These LT-family pages compare actual product options. Model years change at different times across pickups and SUVs. A Denali badge, shared displacement or similar photograph does not establish interchange. Confirm the VIN, engine code and original configuration first.
L83 5.3L enginesCompare product listings, supplied components and written warranty.L84 5.3L enginesCompare product listings, supplied components and written warranty.L86 6.2L enginesCompare product listings, supplied components and written warranty.L87 6.2L enginesCompare product listings, supplied components and written warranty.
These are family-selection links, not a fitment list for every vehicle on this page. Older LS-family engines, HD trucks, diesels and specialty configurations need their own identification.
Need a transmission instead?
Send the VIN, transmission code or identification-label photo, engine details and 2WD/4WD configuration. Confirm the supplied converter, controls, programming, cooling-system work and installation scope in the quote. Engine displacement alone is not enough to select a transmission.
Compare the complete repair cost
Compare the exact assembly price with installation, transferred accessories, required repairs and delivery. Some ship-first offers include a disclosed refundable core deposit; other core/exchange terms are quoted for the selected product. Multiple engines, transmissions or mixed freight items require a shipping quote.