#1  
Old 06-03-2013, 05:54 PM
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77 Canamman 77 Canamman is offline
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Lightbulb 1976-77 A/C parts information

Since I have had to replace just about every component for my A/C system except the compressor in my '76 LeMans, here is some info that I learned:

The evaporators for the 1976-77 A bodies with Controlled Cycle A/C GM part number 3035171/ Delco 15-6249 were also used in the 1979-85 Cadillac Eldorado, Olds Toronado and Buick Riviera. They are readily available for under $60 to your door using UAC part number EV 6340PFC. NOS units have been selling in excess of $200.

http://www.ebay.com/itm/Universal-Ai...ht_1785wt_1091

The 1976-77 A body condensers are the same as 1976 Catalina/Bonneville, and 1976-77 Grand Prix. I was able to purchase one on E-Bay for $129, then the seller jacked the price up over $200 just after I hit the buy it now. He missed this one for $169.99..

http://www.ebay.com/itm/76-Pontiac-B...ht_2641wt_1091

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  #2  
Old 06-03-2013, 06:41 PM
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Brian Baker Brian Baker is offline
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Good info, but I wonder how this applies to the Can Am, given they came with a Grand Prix dash? I had to replace a relay once that attaches near the evaporator box, and when I went to the dealer, he couldn't find it under LeMans or A-body, but found it under Grand Prix or G-body. I wonder if the evaporator is for a GP too?

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  #3  
Old 06-03-2013, 09:20 PM
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77 Canamman 77 Canamman is offline
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The evaporator is the same for all A or G bodies.

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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey

1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles

2017 Sierra SLT 1500 Z71 4X4

2019 Canyon SLT Crew 4X4

  #4  
Old 06-12-2013, 09:46 PM
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77 Canamman 77 Canamman is offline
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Finally got it all together, charged with R-12. Compressor came right on, cooled the vents down to 41 degrees during this 80 degree day at idle car stationary. Next is the Grand Am. Still has a charge, but the compressor hub bearing is noisy.

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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey

1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles

2017 Sierra SLT 1500 Z71 4X4

2019 Canyon SLT Crew 4X4

  #5  
Old 06-13-2013, 11:28 PM
Grand73Am Grand73Am is offline
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Good to read of your success with your a/c. I have to work on mine. Tired of not having it working.

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  #6  
Old 06-14-2013, 07:03 AM
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camerjeff camerjeff is offline
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Good info, and I am also happy to hear of your success, I just reserected the A/C on our 78 Impalla Wagon, and converted it to R-134, it sure makes hauling the 2 Greyhounds more pleasant on these 80+ days.

Good job, my next job is the A/C on the 77 Astre

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Old 05-27-2021, 05:37 PM
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Sorry to bring up old thread like this, but i have problem finding pressure switch to my -76 Grand prix.

It seems on these it is installed to the high side hardline right after/before orifice tube, and i quess the low side accumulator switch will not work there? There is no part number on any dealer or old books for it.

Need help asap.

Here is image of -77 Trans ams bay, its similar to mine. Clutch/pressure switch is on hardline. Can this be the same pressure switch as in lowside?



Last edited by Karck; 05-27-2021 at 05:45 PM.
  #8  
Old 05-27-2021, 07:19 PM
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Quote:
Originally Posted by camerjeff View Post
Good info, and I am also happy to hear of your success, I just reserected the A/C on our 78 Impalla Wagon, and converted it to R-134, it sure makes hauling the 2 Greyhounds more pleasant on these 80+ days.

Good job, my next job is the A/C on the 77 Astre
I have all the equipment, your welcome to use. ( R12)

  #9  
Old 05-27-2021, 08:23 PM
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https://www.ebay.com/itm/15446809687...8AAOSw-PFeTUP8


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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey

1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles

2017 Sierra SLT 1500 Z71 4X4

2019 Canyon SLT Crew 4X4

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