auxiliary battery tray - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Gregsmx · 08-04-2003, 07:32 PM

I'm considering an auxiliary battery for the '75 Blazer restoration, primarily to serve the stereo system.

I see a part in LMC for the auxiliary battery tray for sale, but I'm not sure where it goes.

If anyone has experience with the mounting location, wiring details, or pics would be even better, I'd appreciate the advice.

I also posted on the engine/drivetrain threads.
Thanks, Greg.

apstguy · 08-04-2003, 08:47 PM

My friend had a 83 diesel with two batteries. It mirrors the passanger side (standard) tray. I don't know about the wiring or stuff. It needs a battery isolator (does that sound right?) or something I think. Someone will know more about it.

ElGracho · 08-04-2003, 09:33 PM

You would probably want to run with a battery isolator if you want the extra battery for your stereo. The diesel setup just runs the batteries in parallel. The diesel setup requires you to run the same batteries and to replace them in pairs. $$$.

Prerunner1982 · 08-05-2003, 01:02 AM

i have contemplated doing this.... but havent had the time or money to do so!

**Captkaos** · 08-05-2003, 09:18 AM

On you model, it will mount on the drivers side with the post parallel to the fender. At least that is how the one we were going to install went and the bracket came from GM.

**N2TRUX** · 08-05-2003, 09:39 AM

Check your prices with GM before you buy. I bought a replacement unit for my 82 Blazer a few years ago. I priced LMC, then called the dealer. The GM part was about half of the LMC price....

**Captkaos** · 08-05-2003, 09:46 AM

Ditto on what N2TRUX said. I bought all the stuff for my battery tray on the 78 Jimmy for less than what LMC listed.

Mike76251 · 08-05-2003, 10:39 AM

I put the second factory tray in and it was a breeze to install.
I just went down to the Chevy place and plunked down $60 or so for it.

LOHRTBT · 08-05-2003, 03:06 PM

Yep....I think I got my new tray for like 48 bux or so... But I will eventually move them to the back ofthe truck.

Gregsmx · 08-06-2003, 06:41 PM

Thanks guys for the great feedback. As my front end is completely apart right now, would any of you who have this installation mind posting a pic? I'm planning the other underhood items, A/C, ram air intake etc. and would like to see how it fits.
Thanks.

Mike76251 · 08-07-2003, 12:02 AM

Here is a pic out of a service manual on how the factory wired a diesel. If you have a gas burner you can ignore the relay as it is for the glow plugs.

82 Silverado 4X · 08-07-2003, 03:57 PM

I have the factory dual battery set-up in my 77 Blazer Chalet Camper. It consists of the tray, support bracket and an isolator. I'll try to get you some pics when the rain goes away.

Gregsmx · 08-07-2003, 10:32 PM

Mike, thanks for the diagram. George, looking forward to the pic.

BigAlVB · 08-08-2003, 07:09 AM

The price is $49.95 for the tray and bracket at www.chevyduty.com. And don't forget the Optima batteries!

08-04-2003, 07:32 PM	#1
Gregsmx Registered User Join Date: Jan 2003 Location: San Antonio Tx Posts: 338	auxiliary battery tray I'm considering an auxiliary battery for the '75 Blazer restoration, primarily to serve the stereo system. I see a part in LMC for the auxiliary battery tray for sale, but I'm not sure where it goes. If anyone has experience with the mounting location, wiring details, or pics would be even better, I'd appreciate the advice. I also posted on the engine/drivetrain threads. Thanks, Greg. __________________ '75 Blazer RAT 4X4 "BLAZIN" - Custom frame off Here's the website I'm uploading pics to: Greg's frame off project

08-04-2003, 08:47 PM	#2
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	My friend had a 83 diesel with two batteries. It mirrors the passanger side (standard) tray. I don't know about the wiring or stuff. It needs a battery isolator (does that sound right?) or something I think. Someone will know more about it. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

08-04-2003, 09:33 PM	#3
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,550	You would probably want to run with a battery isolator if you want the extra battery for your stereo. The diesel setup just runs the batteries in parallel. The diesel setup requires you to run the same batteries and to replace them in pairs. $$$. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

08-05-2003, 01:02 AM	#4
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	i have contemplated doing this.... but havent had the time or money to do so! __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

08-05-2003, 09:18 AM	#5
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	On you model, it will mount on the drivers side with the post parallel to the fender. At least that is how the one we were going to install went and the bracket came from GM. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

08-05-2003, 09:39 AM	#6
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Check your prices with GM before you buy. I bought a replacement unit for my 82 Blazer a few years ago. I priced LMC, then called the dealer. The GM part was about half of the LMC price.... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

08-05-2003, 09:46 AM	#7
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Ditto on what N2TRUX said. I bought all the stuff for my battery tray on the 78 Jimmy for less than what LMC listed. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

08-05-2003, 10:39 AM	#8
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,500	I put the second factory tray in and it was a breeze to install. I just went down to the Chevy place and plunked down $60 or so for it.

08-05-2003, 03:06 PM	#9
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	Yep....I think I got my new tray for like 48 bux or so... But I will eventually move them to the back ofthe truck. __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

08-06-2003, 06:41 PM	#10
Gregsmx Registered User Join Date: Jan 2003 Location: San Antonio Tx Posts: 338	Thanks guys for the great feedback. As my front end is completely apart right now, would any of you who have this installation mind posting a pic? I'm planning the other underhood items, A/C, ram air intake etc. and would like to see how it fits. Thanks. __________________ '75 Blazer RAT 4X4 "BLAZIN" - Custom frame off Here's the website I'm uploading pics to: Greg's frame off project

08-07-2003, 12:02 AM	#11
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,500	Here is a pic out of a service manual on how the factory wired a diesel. If you have a gas burner you can ignore the relay as it is for the glow plugs. Attached Images

08-07-2003, 03:57 PM	#12
82 Silverado 4X Genuine Chevrolet Join Date: Feb 2003 Location: South West Pennsylvania. Posts: 582	I have the factory dual battery set-up in my 77 Blazer Chalet Camper. It consists of the tray, support bracket and an isolator. I'll try to get you some pics when the rain goes away. __________________ George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203

08-07-2003, 10:32 PM	#13
Gregsmx Registered User Join Date: Jan 2003 Location: San Antonio Tx Posts: 338	Mike, thanks for the diagram. George, looking forward to the pic. __________________ '75 Blazer RAT 4X4 "BLAZIN" - Custom frame off Here's the website I'm uploading pics to: Greg's frame off project

08-08-2003, 07:09 AM	#14
BigAlVB Registered User Join Date: Mar 2003 Location: Holland, MI Posts: 74	The price is $49.95 for the tray and bracket at www.chevyduty.com. And don't forget the Optima batteries! __________________ "When this car hits 88 miles per hour, you're going to see some serious s*&$!" Back To The Future

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