LT Engine Parts
in Dubai
& the UAE

GM introduced the Gen V small block in the 2014 Silverado and Sierra as the EcoTec3 line: a 5.3 litre coded L83 and a 6.2 litre coded L86. The later versions, L84 and L87, added Dynamic Fuel Management, a more aggressive cylinder-deactivation system than the Active Fuel Management it replaced. The performance side of the same family is the 6.2 LT1 in the Camaro and C7 Corvette, and the supercharged 6.2 LT4.

The three naturally aspirated 6.2 engines, L86, L87 and LT1, are close relatives internally, and that closeness is exactly what causes wrong orders. The truck engines use a taller intake manifold tuned for low-rpm torque; the LT1 uses a lower-profile intake built for high-rpm power. Sharing a bottom end does not mean sharing a part number.

Displacement alone is not an identifier either, because a 5.3 can be an L83 or an L84 depending on build year, and those two split on the deactivation hardware that most repairs are about. On a GM vehicle the eighth character of the VIN identifies the engine, which is why we ask for the VIN rather than the model year.

Cylinder deactivation works by collapsing a lifter so the camshaft cannot open that valve. It is a known weak point across GM's 5.3 and 6.2 V8s, and when one of those lifters fails, its roller can stop turning and grind a flat into the camshaft lobe. The usual first signs are a ticking noise and a misfire code such as P0300 or a single-cylinder code, and continuing to drive on it is how a lifter job turns into a full engine job.

A repair done properly is a set of parts, not one part. Workshops here typically replace the lifters across both banks rather than the failed one, renew the plastic lifter guide trays that hold them square to the cam, fit a camshaft when the lobe is worn, and replace the valley cover assembly that carries the deactivation solenoids and its oil circuit when testing shows a leak or a blocked screen. Head gaskets and bolts come into it once the heads are off.

That is the group we keep depth in for LT engines, because it is what the phone calls are about. Tell us the engine code and the fault and you get a parts list for the whole job rather than a single line item, so the car is not stripped waiting for the second delivery.

LT engine parts are one of the deeper areas of our engine stock. Across the family that covers the cylinder-deactivation repair group described above, plus the service and wear items these engines go through in this climate: filters, spark plugs, ignition coils, water pumps and thermostats, oil pump and timing components, gaskets and seals, and mounts.

We stock ACDelco and GM Genuine Parts for GM platforms, alongside trusted aftermarket lines where the aftermarket part is the sensible choice. On a lifter and camshaft job that choice is worth a conversation rather than a default, and we will give you the honest comparison instead of pushing the higher line.

What we will not do is confirm a specific part number for your car from a model year alone. Send the VIN, or the engine code from the eighth character of it, and the reply names what actually fits.

The deactivation system is the first fork. AFM engines, L83 and L86, and DFM engines, L84 and L87, use different valvetrain hardware, so a lifter set, a guide tray or a valley cover from one is not a substitute for the other even at the same displacement. Any parts search that starts and ends at "5.3" will eventually order the wrong one.

The second fork is truck against car. The taller truck intake on L86 and L87 and the lower LT1 intake mean intake, cover and accessory-bracket parts diverge even where the short block is comparable. Reported failure patterns also cluster: DFM complaints concentrate heavily on L84 and L87 engines built in a narrow window around late 2020 to early 2021, so build date is worth checking rather than assuming.

Your VIN answers all of it. Read the 17 characters at the base of the windscreen on the driver's side or on the plate in the driver's door opening, and send it with a photo of the failed part. We confirm the engine code, the deactivation type and the set before anything leaves the shelf.

A lifter and camshaft job holds a bay for days, and the thing that extends it is a second delivery for a tray, a gasket or a bolt set that was not on the first list. Send us the VIN and the scope and we quote the full set in one go, dispatched same day across Dubai and next day to the other six emirates from Ras Al Khor.

Repeat volume belongs on a trade account. We are open Saturday to Thursday, 8:00 to 18:00, closed Friday, and Dubai is the walk-in counter. If a part has to be ordered rather than picked, you get a lead time in the reply rather than a promise, because a bay held on a maybe is worse than a bay held on a date.

The numbers in the table below come from parts.chevrolet.com fitment tables, and for the few parts that site does not list, from GM dealer parts catalogues. They are a reference for workshops sourcing parts for K2XX and T1XX Gen V LT engines. Confirm each number against your VIN on WhatsApp before ordering.

The two lifter guide tray numbers are the fork that drives wrong orders. K2XX trucks, Silverado/Sierra 1500 2014–2018 and Suburban/Tahoe/Yukon/Escalade 2015–2020, use AFM and take tray 12669184. T1XX trucks, Silverado/Sierra 1500 2019-on and Suburban/Tahoe/Yukon/Escalade 2021-on, use DFM and take tray 12664915. The two trays share similar external dimensions but different internal geometry. The DFM tray will not seat in a K2XX AFM valley, and the AFM tray will not align with T1XX lifter bores. Platform is read from the VIN, not the model year.

The lifter repair itself is now in the table. GM's catalogue carries one live deactivating-lifter number, 12740071, which supersedes 12698946 and 12645725 and spans both the AFM and DFM eras — so the number alone does not tell you the platform, and the VIN still decides. Replace the set across both banks, not the single cylinder that failed. Camshafts split by engine: 12619823 for the K2XX 5.3 L83, 12723516 for the T1XX 5.3 L84, and GM's own service note on that camshaft says the lifters are replaced with it. Four numbers are still missing here and we are not going to guess them: the T1XX DFM valley-cover casting, the T1XX DFM oil pump, and the camshafts for the 6.2 L86 and L87. Send the VIN and engine code for those and we quote from the shelf.