The 2022 Chevy Silverado HD is the third production year for the fourth-generation nameplate, introducing only a few small changes and updates as compared to the preceding 2021 model year. Now, however, GM Authority has learned that the 2022 Chevy Silverado HD’s 730 cold-cranking amps auxiliary battery is currently unavailable to order.
According to GM Authority sources, the Silverado HD’s 730 cold-cranking amps/70 Amp-hr auxiliary battery (RPO code K4B) is currently unavailable to order for all configurations of the Silverado 2500HD and Silverado 3500HD.
The 2022 Chevy Silverado HD’s 730 cold-cranking amps auxiliary battery requires the atmospheric 6.6L V8 L8T gasoline engine, and either the 220-amp alternator (RPO code KW5) or dual alternators (RPO code KHF). The feature is not available in conjunction with the 170-amp alternator (RPO code KW7). Pricing for the feature was previously set at $135.
The 2022 Chevy Silverado HD’s 730 cold-cranking amps auxiliary battery is intended to provide extra electrical juice when needed, such as to help boost cold-weather engine starting power, as well as to supply electricity to external features, such as to a trailer or slide-in camper, in order to maintain cranking power for the primary battery.
As a reminder, the 2022 Chevy Silverado is available with two engine options, including the naturally aspirated 6.6L V8 L8T gasoline engine, rated at 401 horsepower at 5,200 rpm and 464 pound-feet of torque at 4,000 rpm, and the 6.6L V8 L5P turbodiesel Duramax engine, rated at 445 horsepower at 2,800 rpm and 910 pound-feet of torque at 1,600 rpm. The gas-powered L8T connects to the GM six-speed automatic transmission, whereas the diesel-powered L5P connects to the Allison-branded 10-speed automatic transmission.
Under the body panels, the Chevy Silverado HD rides on a more capable version of the GM T1 platform, while production takes place at the GM Flint plant in Michigan, and, more recently, the GM Oshawa plant in Canada.
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Comments
The corporation can’t even source lead acid batteries and there going to build electric cars.
$135 for an ADDITIONAL extra big battery plus mounting and hook ups? That’s a steal…. Yeah you had to order the big engine and big alternator(s) to get it – but they surely couldn’t have made any money on the package if it included the extra battery…. No wonder they discontinued it – at that pricing.
The second battery deletes the regulated battery voltage control system and prognostics, so they save on a number of parts like the current sensor.
Sam – unless GM has something goofy going on with their system, there still needs to be at least ONE voltage regulator function SOMEWHERE on the vehicle.
Traditionally, 90 years ago this was handled by a one, two, or three relay – at first mechanical then starting about 45 years ago transistorized, and now computerized regulators – usually on the rear end bell of the Alternator itself.
I had heard that GM came up with the goofy idea of having the engine control module computer also perform the voltage regulator function – so that if the regulator died you only had to purchase a new pricey ECM.
The point is – if they are ELIMINATING several regulator parts with the simple addition of an additional battery, then they’ve got a goofy superfluous design in the first place.. Knowing GM, I’d say that is entirely possible.
I remember my 1995 Buick Riviera had a dopey data link to go 4 feet from the dashboard to a computerized board in the engine compartment to operate a relay, which then obviously needed an additional wire to go to the air conditioning clutch compressor… Of course the board failed and I had to spend a fortune to get ‘connectivity’ between the distant dashboard (a whopping 48 “) to the compressor clutch to get the car cool in the summertime again. So dopey ideas are entirely possible with GM.
Prognostics? You mean the truck computer prognosticates that you should trade in the measly 220 ampere alternator and replace it with dual 170 amp models in an attempt at further Advertising after the sale?
I think you mean Diagnostics.
On Chevrolet / GMC pickups with gasoline engines, the Auxiliary Battery option adds a 2nd battery and connecting cables and an isolation relay. This extra battery IS charged by the vehicle’s alternator(s), but is NOT used to help start the vehicle. Instead, it provides additional stored battery power for a bed-mounted or towed camper. The isolation relay ALLOWS charging of the 2nd battery, but PREVENTS the camper electrical load from running down the primary starting battery. When connected properly, electrical power from this 2nd battery flows thru the center pin of the 9-pin trailer wiring plug, or the optional bed-mounted Camper/5th Wheel connector. Power from the 9th pin can support electrical loads inside the camper, including charging an additional battery inside the camper. Many smaller vehicles don’t have 9-pin connectors on their trailer wiring harness – they only have 7 or 4 pins.
If your primary starting battery is dead, you can jump start it from the Auxiliary Battery, but you need jumper cables, as the Aux Battery is not connected to the starting circuit – only to the charging circuit and the above mentioned trailer connections.
Tom Brown –
Your explanation makes much more sense than Sam’s…
I still say an additional battery, with wiring, mounting, connectors, and isolation relay is a STEAL for $135…
Anyone who has had to purchase a large battery lately would agree.
Too bad you got downvoted…. I guess common Horse Sense around here isn’t allowed.
I thought 2022 HD ordering was closed, production thru the July end of production was booked? When will the 2023 order guide be available?